Pelaez, M. (November 13, 2025, peer reviewed accepted). Increasing Early Social and Language Skills in Children at Risk for or Diagnosed with Autism Spectrum Disorder (ASD). In M. J. Weiss (Chair), paper presented as Discussant, symposium conducted at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Neimy, H. M., Pelaez, M., Weiss, M. J., Pelaez, R., & Valle, E. (November, 2025). Effects of Bilingualism and Caregiver Differences on the Vocalizations of Infants and Toddlers with a High Likelihood of Autism. In M. J. Weiss (Chair) and M. Pelaez (Discussant), symposium at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Mastrogiacomo, L., Neimy, H. M., Pelaez, M., & Weiss, M. J. (November, 2025). Teaching Parents to Use Contingent Responding to Increase Vocalizations of Infants with and without Known Risk for Autism. In M. J. Weiss (Chair) and M. Pelaez (Discussant), symposium at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Crysdale, C., Harper, J., Pelaez, M., Weiss, M. J., & Neimy, H. M., (November, 2025, accepted). Utilization of a Contingent Vocal Imitation Intervention in the Acquisition of Mands in Young Children with Autism. In M. J. Weiss (Chair) and M. Pelaez (Discussant), symposium at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Pelaez, M. (November 12, 2025, peer reviewed accepted). Conceptual and Methodological Issues in the Analysis of Basic and Complex Human Behavior: From Developmental Precursors to Transformation of Stimulus Function and Rule Governed Behavior. Paper presented at a Panel (D. Robertson, Chair) conducted at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Robertson, D., & Pelaez, M. (November 12, 2025, peer reviewed accepted). College Teacher Development: Toward a Dynamical Systems Approach. Paper to be delivered at the Paper Session on Interdisciplinary Collaboration and Educational Settings at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Monlux, K., & Pelaez, M. (November, 2025, accepted). Remotely Coaching Caregivers to Promote Joint Attention Skills with Neurodiverse Infants in Norway. In M. J. Weiss (Chair) and M. Pelaez (Discussant), symposium at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Pelaez, M. (Oct, 2025). Infant Social Learning: Behavior-Analytic Interventions. Invited Paper delivered for the Pyramid Global Educational Consultants

Pelaez, M. (May, 2025). You Do Then I Do: Teaching Motor Imitation and Vocal Emulation Responses to Toddlers. Paper presented as Discussant at symposium (Y. Sun, Chair) conducted at the Association for Behavior analysis International, Washington, DC.

Pelaez, M. (May, 2025). Collaborating in the Study of Naming and Incidental Naming. Paper presented at Panel Discussion (D. Barnes-Holmes, Chair) of the Association for Behavior analysis International, Washington, DC.

Crysdale, C., Pelaez, M., Mastrogiacomo, L. E., & Harper, J. (May, 2025). Application of a Contingent Vocal Imitation Procedure to Enhance Language Acquisition in Children with Autism Spectrum Disorder. In Y. Sun (Chair) and M. Pelaez, (Discussant), You Do Then I Do: Teaching Motor Imitation and Vocal Emulation Responses to Toddlers, symposium conducted at the Association for Behavior analysis International, Washington, DC.

Monlux, K., & Pelaez, M. (May, 2025). Remotely Coaching Caregivers to Promote Joint Attention and Social Referencing with their Infants in Norway. In Eric Rozenblat (Chair) and Sigmund Eldevik (Discussant), Social Development: Why Social Referencing and Joint Attention are Critical Skills to Teach, symposium conducted at the Association for Behavior analysis International, Washington, DC.

Mastrogiacomo, L. E. Neimy, H. M., Pelaez, M., & Weiss, M. J. (May, 2025). Examination of the Effects of Contingent Parentese Speech and Contingent Vocal Imitation on Vocalizations of Infants at Risk for Autism. In Jessica Piazza (Chair) and Cori Whean (Discussant), Working Together! Collaboration Between Behavior Analysts and Speech-Language Pathologists, symposium conducted at the Association for Behavior analysis International, Washington, DC.

Crysdale, C., Harper, J., Pelaez, M., Weiss, M. J., & Neimy, H. M., (November, 2025, accepted).  Utilization of a Contingent Vocal Imitation Intervention in the Acquisition of Mands in Young Children with Autism.  In M. J. Weiss (Chair) and M. Pelaez (Discussant), symposium at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.  

Pelaez, M. (November 12, 2025, peer reviewed accepted). Conceptual and Methodological Issues in the Analysis of Basic and Complex Human Behavior: From Developmental Precursors to Transformation of Stimulus Function and Rule Governed Behavior. Paper presented at a Panel (D. Robertson, Chair) conducted at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.

Robertson, D., & Pelaez, M. (November 12, 2025, peer reviewed accepted).  College Teacher Development: Toward a Dynamical Systems Approach. Paper to be delivered at the Paper Session on Interdisciplinary Collaboration and Educational Settings at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal.  

Monlux, K., & Pelaez, M. (November, 2025, accepted). Remotely Coaching Caregivers to Promote Joint Attention Skills with Neurodiverse Infants in Norway. In M. J. Weiss (Chair) and M. Pelaez (Discussant), symposium at the International Conference of the Association for Behavior analysis International (ABAI), Lisbon, Portugal. 

Pelaez, M. (Oct, 2025). Infant Social Learning: Behavior-Analytic Interventions. Invited Paper delivered for the Pyramid Global Educational Consultants 

Pelaez, M. (May, 2025). You Do Then I Do: Teaching Motor Imitation and Vocal Emulation Responses to Toddlers. Paper presented as Discussant at symposium (Y. Sun, Chair) conducted at the Association for Behavior analysis International, Washington, DC. 

Pelaez, M. (May, 2025). Collaborating in the Study of Naming and Incidental Naming. Paper presented at Panel Discussion (D. Barnes-Holmes, Chair) of the Association for Behavior analysis International, Washington, DC.  

Crysdale, C., Pelaez, M., Mastrogiacomo, L. E., & Harper, J. (May, 2025). Application of a Contingent Vocal Imitation Procedure to Enhance Language Acquisition in Children with Autism Spectrum Disorder.  In Y. Sun (Chair) and M. Pelaez, (Discussant), You Do Then I Do: Teaching Motor Imitation and Vocal Emulation Responses to Toddlers, symposium conducted at the Association for Behavior analysis International, Washington, DC. 

Monlux, K., & Pelaez, M. (May, 2025). Remotely Coaching Caregivers to Promote Joint Attention and Social Referencing with their Infants in Norway. In Eric Rozenblat (Chair) and Sigmund Eldevik (Discussant), Social Development: Why Social Referencing and Joint Attention are Critical Skills to Teach, symposium conducted at the Association for Behavior analysis International, Washington, DC.  

Mastrogiacomo, L. E. Neimy, H. M., Pelaez, M., & Weiss, M. J. (May, 2025). Examination of the Effects of Contingent Parentese Speech and Contingent Vocal Imitation on Vocalizations of Infants at Risk for Autism. In Jessica Piazza (Chair) and Cori Whean (Discussant), Working Together! Collaboration Between Behavior Analysts and Speech-Language Pathologists, symposium conducted at the Association for Behavior analysis International, Washington, DC.  

Pelaez, M (March, 2025). Aprendizaje Social Infantíl:  Intervenciones Basadas en el Analisis Conductual (Infant Social Learning: Behavior-Analytic Interventions). Conferencia Magistral de Clausura, Celebración del Día Mundial del Análisis de la Conducta (World Behavior Analysis Day), Universidad Veracruzana (UV) and University of Baja California (UBC), México. 

Pelaez, M. (February 29, 2025). Early Assessment and Behavior-Analytic Interventions. Invited paper delivered at the Institute for Applied Behavioral Science (M. J. Weiss, Chair), Endicott College, MA. 

Pelaez, M., & Pham, A. (February, 2025). Infant Social Learning: Early Assessments and Behavior-Analytic Interventions. Paper delivered at the National Association for School Psychology Convention, Seattle WA. 

Pelaez, M., Pham, A. V., Del Cuadro, Y., Kamara, S., & Reyes, C. (February, 2025). Training Temporal Relations Among Stimuli and Behavior in Young Children. Poster presented at the National Association for School Psychology Convention, Seattle WA. 

Monlux, K., Pelaez, M., & Crysdale, C. (February, 2025).  Teaching and Assessing Joint Attention Skills in Children with Autism. Paper presented at the National Association for School Psychology Convention, Seattle WA. 

Pelaez, M. (November 1^st, 2024). Infant Social Learning (Part 1): Establishing Infant Eye Contact and Vocal Imitation. Invited talk delivered at the Gladys Williams International Science Practitioner Forum. Virtual, NY. 

Pelaez, M. (November 9, 2024). Infant Social Learning (Part 2): Infant Joint Attention and Social Referencing. Invited talk delivered at the Gladys Williams International Science Practitioner Forum. Virtual, NY. 

Mastrogiacomo, L., Crysdale, C., Pelaez, M., & Harper, J. (October, 2024).  Using contingent vocal imitation (CVI) to increase language in children with autism spectrum disorder (ASD): A replication. Presented as part of the symposium “Developments in Research in Early Language Acquisition of Infants and Young Children” at the 45^th Annual Meeting of the Berkshire Association for Behavior Analysis and Therapy, Worchester, MA. 

Pelaez, M., & Novak, G. (May, 2024). Language Development as the Behavior Scientist Sees It.  Invited Address at 50^th Annual Convention of the Association for Behavior Analysis International (ABAI). Philadelphia, PA.  

Monlux, K., & Pelaez, M. (May, 2024). How to Implement Infant Operant Learning Procedures for Research and Practice.  Workshop co-delivered at the 50^th Annual Convention of the Association for Behavior Analysis International (ABAI). Philadelphia, PA. 

Hickey, J., Symons, R., Glick, C., Crysdale, C., & Pelaez, M., & Leaf, J.  (May, 2024). Training Parents of Infants to Use Contingent Vocal Imitation: A Behavioral Contribution to Responsive Caregiving Practices. Paper delivered at 50th Annual Convention of the Association for Behavior Analysis International (ABAI). Philadelphia, PA. 

O’ Connell-Sussman, Weiss, M. J., Pelaez, M., & Feeley, K. (May, 2024). Look Who’s Talking: Increasing Babbling Through Caregiver Training with Infants with Down Syndrome. Paper delivered at 50th Annual Convention of the Association for Behavior Analysis International (ABAI). Philadelphia, PA. 

Robertson, D. L., & Pelaez, M. (May, 2024). Enactment without enforcement. Paper at the 50^th Annual Convention of the Association for Behavior Analysis International (ABAI). Philadelphia, PA.  

Pelaez, M. (August, 2023). Infant Social Learning. Invited Address delivered at the American Psychological Association (APA) Convention as the recipient of the Nathan H. Azrin Award for Applied Science Contributions, Washington DC. 

Pelaez, M. (May, 2023). Applied Research on Early Childhood Development. In M. Pelaez (Discussant) and C. A. McKeown (Chair), symposium to be conducted at the Annual Convention of Association for Behavior Analysis International (ABAI), Denver CO. 

Neimy, H., & Pelaez, M., Tarbox, J. J., Weiss, M. J., Pelaez, R., & Lage, E. (May, 2023). Talk to me baby! Promoting vocalizations and echoics in neurodiverse infants. In M. Pelaez (Discussant) and C. A. McKeown (Chair), Applied Research on Early Childhood Development, symposium to be conducted at the Association for Behavior Analysis International (ABAI), Denver CO. 

Monlux, K. & Pelaez, M. (May, 2023). Training parents to establish joint attention and social referencing repertoires in neurodiverse toddlers via operant learning procedures. In M. Pelaez (Discussant) and C. A. McKeown (Chair), Applied Research on Early Childhood Development, symposium to be conducted at the Association for Behavior Analysis International (ABAI), Denver CO. 

Monlux, K., & Pelaez., M. (May, 2023). Early Infant Learning Procedures. Workshop presented at the 49th Annual Meetings of the Association for Behavior Analysis International, Denver, CO. 

Robertson, D. L., & Pelaez, M. (May 28, 2023). Metacontingencies: Commentary on a higher education case study. Paper presented at the 49^th Annual Meetings of the Association for Behavior Analysis International, Denver, CO. 

Pelaez, M. (September 14, 2022). Apprendimento sociale nell’ infanzia:  Interventi basati sull’analisi comportamentale. Invited Address delivered at the 1st International Conference of the Association for Behavior Analysis Italy: The science of behavior: between tradition and innovation, (P. Moderato, Chair), Milan, Italy. 

Pelaez, M. (September, 2022). Behavior-analytic interventions with infants and young children to train pivotal social skills.  In M. Pelaez (Discussant) and H. Neimy (Chair), symposium to be conducted at the Association for Behavior Analysis International (ABAI), Dublin, Ireland. 

Mery, J., Pelaez, M., & Tarbox, J. (September, 2022). A parent training procedure for establishing infant eye contact. In M. Pelaez (Discussant) and H. Neimy (Chair), Behavior-analytic interventions with infants and young children to train pivotal social skills, symposium to be conducted at the Association for Behavior Analysis International (ABAI), Dublin, Ireland. 

Neimy, H. M., Pelaez, M., Tarbox, J., Weiss, M. J., Pelaez, R., & Valle, E. (September, 2022). Social reinforcement procedures to establish vocalizations and echoics in infants. In M. Pelaez (Discussant) and H. Neimy (Chair), Behavior-analytic interventions with infants and young children to train pivotal social skills, symposium to be conducted at the Association for Behavior Analysis International (ABAI), Dublin, Ireland. 

Monlux, K. D., Pelaez, M., & Tarbox, J. (September, 2022). Teaching joint attention skills and social referencing in toddlers and young children with autism spectrum disorder. In M. Pelaez (Discussant) and H. Neimy (Chair), Behavior-analytic interventions with infants and young children to train pivotal social skills, symposium to be conducted at the 11^th International Meeting of the Association for Behavior Analysis International (ABAI), Dublin, Ireland. 

Robertson, D. L., & Pelaez, M. (September, 2022). Centering de-centered students and universities: Problematical messages from the organizational environment.  Paper presented at the 11th International Meetings of the Association for Behavior Analysis, Dublin, Ireland.   

Pelaez, M., & Monlux, K. (June, 2022). Training caregivers to teach critical social skills with their own infants and young children. Invited workshop to be deliver at the Annual Conference of Woman in Behavior Analysis (WIBA), Nashville, TN. 

Pelaez, M. (May, 2022). Early human learning. Invited paper at 48th annual meetings of the Association for Behavior Analysis International, Boston, MA. 

Pelaez, M., Pelaez, R., & Lage, E. (May, 2022).  The Effects of Contingent Motherese Speech and Vocal Imitations on the Vocalizations of Typically Developing Infants and an Infant At-Risk for Autism Spectrum Disorder: A Comparison of Research. In D. E. Conine (Discussant), presented at the 48th annual meetings of the Association for Behavior Analysis International, Boston, MA. 

Robertson, D. L., & Pelaez, M. (May, 2022). Systems equifinality and faculty issues at universities: Unintended consequences of performance metrics. Paper presented at the 48th annual meetings of the Association for Behavior Analysis International, Boston, MA. 

Pelaez, M. (March, 2022). Behavior analysis of infant social learning.  Invited address delivered at the California Association for Behavior Analysis (CALABA), Santa Clara, CA. 

Pelaez, M. (November, 2021). Infant social learning: Behavior-analytic interventions with infants “at risk” of autism.  Keynote Address delivered as Honorary President of the VIII International Seminar on Behavior and its Applications (SINCA) (H. Martinez, Chair), UNED, Mexico. 

Robertson, D. L., Pelaez, M., & Perez, T. S. (November, 2021). A policy case study of faculty: Gender, race-ethnicity, and faculty appointment type. Paper presented at the Annual Meetings of the Association for the Study of Higher Education, San Juan, Puerto Rico. 

Pelaez, M. (June, 2021).  Infant Social Learning:  Behavior-Analytic Interventions. Invited presentation, Cambridge Center for Behavior Studies Series (CCBS). 

Pelaez, M. (May, 2021). Relational Frame Theory and Verbal Behavior Development Theory: Moving Forward Together in the Analysis of Human Language and Cognition. In R. D. Greer (Chair) and M. Pelaez (Discussant), Symposium conducted at the Association for Behavior Analysis International 47th Annual Convention, San Francisco, online. 

Robertson, D. L., & Pelaez, M. (May, 2021). Interrelationships of intentional organizational change and negative unintended consequences: A dynamical systems approach. Paper presented at the 47th annual meetings of the Association for Behavior Analysis International, San Francisco, CA.   

Pelaez, M. (May, 2021). Basic Research in Understanding Child Development Phenomena. In N. Luke (Chair), Child Development: Recent Advancements in Theory and Basic and Applied Research, Symposium conducted at the Association for Behavior Analysis International 47th Annual Convention, San Francisco, online. 

Pelaez, M. (September, 2020).  The Negative Effects of Touch and Hugging Deprivation in the Era of Covid-19.  Interview by Florencia Valdes, Radio Francia International, Paris, France. 

Pelaez, M. (September, 2020). Attachment and Fears. Invited presentation delivered at the 21st GW International Scientist/Practitioner Forum (G. Williams, Chair).  

Monlux, K., Pelaez, M., & Tarbox, J. (May, 2020).  Training parents to establish joint attention and social referencing repertoires in toddlers with developmental disorders.  In M. Pelaez (Chair) & J. Virues Ortega (Discussant), Using Behavior Analysis to Promote Early Social Repertoires in Infants and Children with Developmental Disabilities, Symposium conducted at the Association for Behavior Analysis International 46^th Annual Convention, Washington, D.C. online. 

Perfillon, M., Riviere, V., & Pelaez, M. (May, 2020).  Behavior analysis and variations: The case of behavioral changes.  In R. E. Laitinen (Chair) & J. Rosales-Ruiz (Discussant), Behavioral and Verbal Behavioral Cusps: Research and Practical Applications, Symposium conducted at the Association for Behavior Analysis International 46^th Annual Convention, Washington, D.C. online. 

Robertson, D. & Pelaez, M. (May, 2020).  Neoliberalism, Organizational Behavior Management, and the Attack on Tenure.  In D. Robertson (Chair), Paper Session at the Association for Behavior Analysis International 46^th Annual Convention, Washington, D.C. online. 

Monlux, K., Pelaez, M. (September, 2019). Establishing Joint Attention Skills to Facilitate Social Referencing Repertoires in Toddlers Via Operant Learning Procedures. In B. DiSanti (Chair), Promoting Early Social Skills in Infants and Children At-Risk of Autism Spectrum Disorder and Fragile X Syndrome. Symposium conducted at the Association for Behavior Analysis International 10th International Convention, Stockholm, Sweden. 

Neimy, H., Pelaez, M., Monlux, K., Carrow, J., Tarbox, J., & Weiss, M. J. (September, 2019). Social Reinforcement Procedures to Establish Vocalizations and Echoics in Infants At-Risk of Autism Spectrum Disorder. In J. Carrow (Chair), Promoting Early Social Skills in Infants and Children At-Risk of Autism Spectrum Disorder and Fragile X Syndrome. Invited Symposium at the Association for Behavior Analysis International 10^th, International Convention, Stockholm, Sweden. 

Pelaez, M. (May, 2019). (Discussant). Responding to the Emotions of Others: Theory, Research, and Practice in Autism Treatment.  Symposium at the Association for Behavior Analysis International 45th Annual Convention, Chicago, IL. 

Pelaez, M. (May, 2019).  Engineering the Contingency Fields for Developing Early Attending, Joint Attending and Social Referencing Repertoires.  In R. E., Laitinen (Chair), Panel Discussion at the Association for Behavior Analysis International 45th Annual Convention, Chicago, IL. 

Robertson, D., & Pelaez, M. (May, 2019). Intentional systemic change in pursuit of competing objectives.  In P. Cornelius-Dams (chair), Looking at the Big Picture Through Systemic Change, paper session at the Association for Behavior Analysis International 45th Annual Convention, Chicago, IL. 

Pelaez, M. (May, 2018). (Discussant), Operant learning procedures to train eye contact, vocalizations, joint attention, and social referencing in young children with autism, Invited Symposium at the Association for Behavior Analysis International 44th Annual Convention, San Diego, CA. 

Carrow, J., Pelaez, M., Tarbox, J., Neimy, H., & Monlux, K. (May, 2018). A parent training model for increasing eye contact among infants at-risk of autism. In K. Monlux (Chair), Operant Learning Procedures to Train Eye Contact, Vocalizations, Joint Attention, and Social Referencing in Young Children with Autism, Invited Symposium at the Association for Behavior Analysis International 44th Annual Convention, San Diego, CA. 

Pelaez, M. (May, 2018).  An Expanded Analysis of Joint Attending and Social Referencing:  Toward a Functional Taxonomy.  In G. Williams (Chair), Panel Discussion (with R. Laitinen & P. Holth) conducted at the Association for Behavior Analysis International 44th Annual Convention, San Diego, CA. 

Ramaswamy, S., Pelaez, M., Monlux, K., Carrow, J., & Neimy, H. (May, 2018). Vocalizations and joint attention as a function of operant learning procedures in neurotypical infants. In K. Monlux (Chair) & M. Pelaez (Discussant), Operant Learning Procedures to Train Eye Contact, Vocalizations, Joint Attention, and Social Referencing in Young Children with Autism, Invited Symposium at the Association for Behavior Analysis International 44th Annual Convention, San Diego, CA. 

Neimy, H., Pelaez, M., Tarbox, J., Monlux, K., & Carrow, J. (May, 2018). Promoting vocalizations in infants at-risk of autism via parent training and social reinforcement procedures. In K. Monlux (Chair) & M. Pelaez (Discussant), Operant Learning Procedures to Train Eye Contact, Vocalizations, Joint Attention, and Social Referencing in Young Children with Autism, Invited Symposium conducted at the annual convention of the Association for Behavior Analysis International, San Diego, CA. 

Novak, G. & Pelaez, M. (May, 2018).  Behavioral Systems Theory and Developmental Psychology.  In M. Pelaez (Chair), Recent Developments in Behavioral Development and Behavioral Variability, paper session conducted at the annual convention of the Association for Behavior Analysis International, San Diego, CA. 

Perfillon, M., Riviere, V., & Pelaez, M. (May, 2018). Behavioral variability in development: A comparison study between variable and repetitive behaviors.  In M. Pelaez (Chair), Recent Developments in Behavioral Development and Behavioral Variability, paper session conducted at the annual convention of the Association for Behavior Analysis International, San Diego, CA. 

Robertson, D. L., & Pelaez, M. (May, 2018).  Sustaining Long-Term, Systemic Change at Large Organizations Experiencing Leadership Succession.  In D. Robertson (Chair), paper presented at the annual convention of the Association for Behavior Analysis International, San Diego, CA. 

Pelaez, M. (February, 2018).  Baby Siblings of Children with Autism:  Early Behavior-Analytic Interventions with Infants “At Risk.” In J. J. Tarbox (Chair), Invited address delivered at the 12^th Annual Autism Conference of the International Association for Behavior Analysis, Miami, Florida. 

Pelaez, M. (November, 2017).  Operant learning procedures with infants.  In M. Pelaez (Chair) and P. Holth (Discussant), Establishing Early Social Skills Among Infants and Children at Risk of Autism and Developmental Disorders via Operant Learning Procedures. Symposium conducted at the Association of Behavior Analysis International, 9th International Annual Convention, Paris, France. 

Perfillon, M., Vintere, V., & Pelaez, M. (November, 2017).  Behavior variability and the study of human development.  In P. Vintere (Chair), Topics in Behavior Development Theory.  Paper presented at Association for Behavioral Analysis International, 9th International Convention, Paris, France. 

Carrow, J., Pelaez, M., Tarbox, J., Neimy, H., & Monlux, K. (November, 2017). Improving eye contact among infants and toddlers at risk of developmental disorders using synchronized reinforcement procedures. In M. Pelaez (Chair) and P. Holth (Discussant), Establishing Early Social Skills Among Infants and Children at Risk of Autism and Developmental Disorders via Operant Learning Procedures. Invited Symposium conducted at the Association of Behavior Analysis International, 9th International Annual Convention, Paris, France. 

Monlux, K., Pelaez, M., Tarbox, J., Carrow, J., & Neimy, H. (November, 2017). Establishing joint attention skills to facilitate social referencing repertoires among infants and toddlers using operant learning procedures. In M. Pelaez (Chair) and P. Holth (Discussant), Establishing Early Social Skills Among Infants and Children at Risk of Autism and Developmental Disorders via Operant Learning Procedures. Invited Symposium conducted at the Association of Behavior Analysis International, 9th International Annual Convention, Paris, France. 

Neimy, H., Pelaez, M., Tarbox, J., Monlux, K., & Carrow, J. (November, 2017). Promoting early vocalizations among infants and toddlers using contingent social reinforcement. In M. Pelaez (Chair) and P. Holth (Discussant), Establishing Early Social Skills Among Infants and Children at Risk of Autism and Developmental Disorders via Operant Learning Procedures. Invited Symposium conducted at the Association of Behavior Analysis International, 9th International Annual Convention, Paris, France. 

Robertson, D. L., & Pelaez, M. (November, 2017).  Exploring the issue of leadership succession during large-scale organizational change.  Paper presented at the Association for Behavioral Analysis International, 9th International Convention, Paris, France. 

Carrow, J., Pelaez, M., Tarbox, J., Monlux, K., & Neimy, H. (May, 2017). Establishing joint attention skills to facilitate social referencing repertoire in toddlers via operant learning procedures.  In T. G. Szabo (Chair), Reinforcement Procedures for Facilitating the Development of Eye Contact, Vocalizations, Joint Attention, and Social Referencing Among Young Children at Risk of Autism and Developmental Disorders. Symposium conducted at the Association for Behavior Analysis International 43rd Annual Convention, Denver, CO. 

Mendez, M., & Pelaez, M. (May, 2017). Does social referencing have an overall impact on child compliance. In P. Holth (chair), poster presented at the annual conference of the Association for Behavior Analysis International (ABAI), Denver, CO. 

Neimy, H., Pelaez, M., Tarbox, J., Carrow, J., & Monlux, K. (May, 2017). Establishing early eye contact and vocalizations among infants and toddlers at risk of autism and developmental disorders. In T. G. Szabo (Chair), Reinforcement Procedures for Facilitating the Development of Eye Contact, Vocalizations, Joint Attention, and Social Referencing Among Young Children at Risk of Autism and Developmental Disorders, Symposium conducted at the Association for Behavior Analysis International 43rd Annual Convention, Denver, CO. 

Pelaez, M. (May, 2017). Reinforcement procedures for facilitating the development of eye contact, vocalizations, joint attention, and social referencing among young children at risk of autism and developmental disorders. In T. G. Zabo (Chair), paper delivered as discussant at symposium conducted at the Association for Behavior Analysis International 43rd Annual Convention, Denver, CO. 

Pelaez, M., & Holth, P. (May, 2017).  Social reinforcers for infant behavior: Primary or conditioned? In Jasson Cohen (Chair) and Svein Eikeseth (Discussant), An Evaluation of the Variables Related to the Arrangement and Outcomes of Conditioned Reinforcement Procedures, symposium conducted at the Association for Behavior Analysis International (ABAI) 43rd Annual Convention, Denver, CO. 

Robertson, D. L. & Pelaez, M. (May, 2017).  Changing horses in mid-stream: Leadership succession during large-scale organizational change.  In D. Robertson (chair), The Influence of Leadership on Organizational Culture and Change.  Paper delivered at the annual meetings of the Association for Behavior Analysis International, Denver, CO. 

Williams, C., & Pelaez, M. (May, 2017).  Maintaining eye contact of typically developing infants.  In E. Kyonka (chair), poster presented at the annual conference of the Association for Behavior Analysis International (ABAI), Denver CO.
 

Pelaez, M. (October, 2016).  Operant Learning Procedures to Establish Early Social-Learning and Communication Repertoires.  In D. Greer (Chair), Invited Address delivered at the Annual Meeting of the Comprehensive Application of Behavior Analysis to Schooling (CABAS), New Jersey.  

Pelaez, M. (September, 2016). Behavior-Analytic Interventions with Infants at Risk of Developmental Delays. In Y. Cruz (Chair), Invited Address delivered at the 36^th Annual Meeting of the Florida Association for Behavior Analysis (FABA), Fort Lauderdale, FL. 

Carrow, J., Pelaez, M., Tarbox, J., Neimy, H., & Monlux, K. (May, 2016). Using synchronized reinforcement procedures to increase eye contact in infants at risk of developmental disorders. In M. Pelaez (Chair), Infants and Children at Risk of ASD: Procedures for Establishing Early Social Skills, Invited Symposium conducted at the Association for Behavior Analysis International 42nd Annual Convention, Chicago, IL. 

Monlux, K., Pelaez, M., Tarbox, J., Carrow, J., & Neimy, H. (May, 2016). Establishing joint attention and social referencing via operant learning paradigm. In M. Pelaez (Chair), Infants and Children At Risk of ASD: Procedures for Establishing Early Social Skills, Invited Symposium conducted at the Association for Behavior Analysis International 42nd Annual Convention, Chicago, IL. 

Neimy, H., Pelaez, M., Tarbox, J., Monlux, K., & Carrow, J. (May, 2016). Promoting vocalizations in infants and toddlers using vocal imitation and mothers’ speech. In M. Pelaez (Chair), Infants and Children at Risk of ASD: Procedures for Establishing Early Social Skills, Invited Symposium conducted at the Association for Behavior Analysis International 42nd Annual Convention, Chicago, IL. 

Robertson, D. L., & Pelaez, M. (May, 2016).  Using behavior analytic concepts to produce systemic change at scale in a large research university.  Paper presented at the annual meetings of the Association for Behavior Analysis International, Chicago, IL. 

Pelaez, M. (October, 2015).  Infants at risk of developmental delays:  Early behavior-analytic interventions.  Invited speaker at the Annual Conference of the Nevada Association for Behavior Analysis, Las Vegas, NV. 

Pelaez, M. (July, 2015). The benefits of massage:  Babies and beyond. In Mitsutoshi Iwashita (Chair), invited seminar delivered at The International Conference of Midwives (ICM) and Asia Pacific Regional Conference, Yokohama, Japan. 

Pelaez, M. (July, 2015). Multi-Sensorial Stimulation and Happy, Healthy Baby Development. Invited address televised to China, Singapore, and Taiwan, The Asia Pacific Regional Conference, sponsored by Johnson & Johnson, Company, Tokyo, Japan. 

Pelaez, M. (July, 2015).  Touch Seminar: By Having Touch, let’s Enrich Baby’s Senses.  Workshop delivered at pre-conference of The International Conference of Midwives (ICM) and Asia Pacific Regional Conference, Yokohama, Japan. 

Pelaez, M., Costa, A., & Martinez, P. (May, 2015). Procedures for reinforcing vocalizations and for preschoolers learning new tacts and spontaneous mands.  In D. Greer (Chair and Discussant), A Revolution in Our Understanding and Treatment of Verbal and Social Development, invited symposium conducted at the 41^st Annual Convention of the Association for Behavior Analysis International, San Antonio, TX. 

Robertson, D., L., & Pelaez, M. (May, 2015).  Shaping organizational systems and individual behavior at a large metropolitan research university.  In D. Robertson (Chair), Using OBM to Increase Student Retention in Higher Education.  Paper session conducted at the 41^st Annual Convention of the Association for Behavior Analysis International, San Antonio, TX. 

Pelaez, M. (June, 2014). The benefits of massage: Babies and beyond.  In T. Lavender (Chair) Touch: An essential first step towards child development. Invited scientific symposium conducted at the 30th Triennial International Conference of Midwives, Prague, Czech Republic. 

Pelaez, M. (June, 2014). Taller de masaje del lactante. Workshop conducted at the 30th Triennial International Conference of Midwives, Prague, Czech Republic. 

Pelaez, M. & Field, T. (June, 2014). Infant massage. Workshop conducted at the 30th Triennial International Conference of Midwives, Prague, Czech Republic. 

Pelaez, M. (June, 2014). The importance of infant touch and massage. Meet the experts’ presentation at the 30th Triennial International Conference of Midwives, Prague, Czech Republic. 

Pelaez, M. (May, 2014). Intervention for developmental delays in infancy. In E.A. Mayville (Chair), Autism in Infancy: Behavioral Systems Conceptualization and Practical Considerations. Invited Symposium conducted at the 40^th Annual Convention of the Association for Behavior Analysis International, Chicago, IL. 

Robertson, D., L., & Pelaez, M. (May, 2014). Changing undergraduate education through contingency management in a research university with 54,000 students. In (D. Robertson, Chair) OBM in Public Institutions. Paper session conducted at the 40^th Annual Convention of the Association for Behavior Analysis International, Chicago, Il. 

Pelaez, M. (May, 2014). Human Development SIG (M. Pelaez, Chair & H. Reese, Co-Chair).  Poster presented at the ABAI Expo at the 40^tth Annual Convention of the Association for Behavior Analysis International, Chicago, Il. 

Pelaez, M. (May, 2014). Applied Research.  Discussant of seven posters reported at the 40^tth Annual Convention of the Association for Behavior Analysis International, Chicago, IL. 

Pelaez, M. (October, 2013). Behavioral systems approach to child development.  In (M. Pelaez, Chair), Assessing Developmental Issues in Behavior Analysis. Paper session conducted at the Seventh International Conference of the Association for Behavior Analysis International, Mérida, México. 

Robertson, D.L., & Pelaez, M. (October, 2013). Intentional change and shaping executive behavior at a large research university. In D. Robertson (Chair), OBM Goes to Universities, Companies and Aircraft Crew. Paper session conducted at the Seventh International Conference of the Association for Behavior Analysis International, Mérida, México. 

Pelaez, M. (May, 2013).  Why Do We Follow Rules? A Functional and Structural Analysis of Rules and Rule-Governed Behavior.  In M. Pelaez (Chair) Paper Session, Historical and Theoretical Issues in Human Development delivered at the 39^th Annual Convention of Association for Behavior Analysis International (ABAI), Minneapolis, MN. 

Reese, H. & Pelaez, M. (May, 2013). Human Development. Special event of the ABAI Program Committee held at the 39^th Annual Convention of the Association for Behavior Analysis International (ABAI), Minneapolis, MN. 

Robertson, D., & Pelaez, M. (May, 2013).  Shaping the Behavior of 40,000 Undergraduates in Support of their Academic Success. Paper presented at the 39^th Annual Convention of the Association for Behavior Analysis International (ABAI), Minneapolis, MN. 

Schnerch, G., Pelaez, M., Holth, P., & Flavia, J. (May, 2013). Assessing and Teaching Social Referencing and Joint Attention in Children with Autism. Workshop delivered at the 39^th Annual Convention of Association for Behavior Analysis International (ABAI), Minneapolis, Minnesota. 

Gewirtz, J. & Pelaez, M. (May, 2013). Essays Masquerading as Proper Research Reports:  Uses and Misuses of Demographic Independent Variables. In M. Pelaez (Chair) Paper Session, Historical and Theoretical Issues in Human Development delivered at the 39^th Annual Convention of Association for Behavior Analysis International (ABAI), Minneapolis, Minnesota. 

Deleon, E., & Pelaez, M. (May, 2013).  Use of Picture Exchange Communication System to Reduce Screaming Behavior in a Child with Autism. Poster presented at the 39^th Annual Convention of Association for Behavior Analysis International (ABAI), Minneapolis, Minnesota. 

Pelaez, M. (March, 2013).  Dimensions of Rules and their Effects on Human Behavior:  A Taxonomy. Invited paper delivered at the Second Sarasota Symposium on Behavior Analysis (Iver Iversen & Per Holth, Chairs), Sarasota, FL. 

Pelaez, M. (February, 2013). Infants at Risk of Developmental Delays: Early Behavior-Analytic Interventions. Three-hour Workshop delivered for Psychology Academy and The Center for Children and Families (CEUs offered), and the Behavior Analysis Program, Florida International University, Miami, Fl. 

Pelaez, M. (September, 2012). The operant nature of social referencing.  In M. Pelaez (Chair) and L. Hayes (Discussant), Intersections Between Joint Attention, Social Referencing, and Perspective Taking.  Symposium conducted at the 6^th Conference of the European Association for Behaviour Analysis, Lisbon, Portugal. 

Robertson, D., & Pelaez, M. (September, 2012).  Changing university contingencies to support undergraduate students’ success. In J. Leslie (Chair), Teaching and Learning.  Paper session conducted at the 6^th Conference of the European Association for Behaviour Analysis, Lisbon, Portugal. 

Pelaez, M. (September, 2012).  Dimensions of rules and their correspondence to rule-governed behavior: A taxonomy.  Invited paper presented at the 10^th International Congress on Behavior Studies (Per Holth, Chair & Phil Chase, Discussant), Lisbon, Portugal. 

Pelaez, M. (May, 2012).  Behavioral systems in development: From simple to complex levels of analysis.  In G. Novak (Chair), Finding the Baby in the Bathwater:  A Behavioral Systems approach to Child Development, Invited Symposium conducted at the Association for Behavior Analysis International (ABAI) 38th Annual Convention, Seattle, WA.  

Robertson, D., & Pelaez, M. (May, 2012). A University–Wide System for Improving Undergraduate Students’ Academic Success.  In J. L. Austin (Chair), symposium conducted at the Association for Behavior Analysis International (ABAI) 38^th Annual Convention, Seattle, WA. 

Pelaez, M. (November, 2011).  The Amazing Infant (La Sorprendente Conducta de los Bebés). Invited Address delivered at the Sixth International Conference of the Association for Behavior Analysis International, J. Virués (Chair), Granada, Spain. 

Robertson, D., & Pelaez, M. (November, 2011). Contingencies and Metacontingencies to Increasing Undergraduate Students’ Academic Success at a Large Research University (Contingencias y Metacontingencias Dirigidas a Incrementar el Exito Académico en Estudiantes Universitarios de Pregrado.  In D. Robertson (Chair), paper presented at the Sixth International Conference of the Association for Behavior Analysis International, Granada, Spain. 

Amir Kiaei, Y., Pelaez, M., Schnerch, G., & Virués–Ortega, J. (November, 2011).  Social Referencing in Infants of Depressed Mothers (Referenciación Social en Bebés de Madres Deprimidas). Poster presented at the Sixth International Conference of the Association for Behavior Analysis International, Granada, Spain. 

Pelaez, M. (November, 2011). El Niño Increíble.  Invited Presentation delivered at The University of Córdoba, Córdoba, Spain. 

Pelaez, M. (May, 2011).  Developmental Theories and Behavior Analysis: A Discussion of Robert Siegler’s Skinner Lecture.  In M. Cigales (Chair) & G. D. Novak (CE Instructor), Panel Discussion at the 37^th Annual Convention of the Association for Behavior Analysis International (ABAI), Denver, Colorado. 

Pelaez, M. (May, 2011).  The Human Developmental Process and How Our Conceptual Understanding of It Can Affect Instructional Decisions.  Discussant of symposium (N. Luke, Chair) conducted at the 37^th Annual Convention of the Association for Behavior Analysis International (ABAI), Denver, Colorado. 

Pelaez, M. (August, 2010). Touch and Multisensorial Experiences. Invited Presentation at Multimedia International Event of Wella Professionals Care, Dubrovnick, Croatia. 

Pelaez, M. (May, 2010).  Moving Beyond Joint Attention:  The Analysis of Social Referencing Response in Identifying Autism.  In G. Novak (Chair & Discussant), From Joint Attention to Social Referencing:  Two Major Developmental Deficits in Autism.  Symposium conducted at the Association for Behavior Analysis International (ABAI) Convention, San Antonio, TX. 

Pelaez, M. (May, 2010).  Fred S. Keller is One Hundred and Eleven Years Old.  In S. Yen (Chair).  Panel Discussion conducted at the Association for Behavior Analysis International (ABAI) Convention, San Antonio, TX.  

Pelaez, M., & Robertson, D. (May, 2010).  On Self-Sacrifice and Martyrdom:  From Self-Generated Rules to Rules Provided by Others.  In T. Ward (Chair) & S. Glenn (Discussant), Invited Symposium conducted at the Association for Behavior Analysis International (ABAI) Conference, San Antonio, TX. 

Pelaez, M. (November, 2009).  Aprendizaje Social e Intervenciones Tempranas para Niños con Riesgo en el Desarrollo. In J. Herruzo (Chair), Invited Presentation at the University of Córdoba, Córdoba, Spain. 

Pelaez, M. (October, 2009).  A Behavioral Systems Approach to Human Development.  Invited Address delivered at the Nevada Association for Behavior Analysis, Reno, NV. 

Pelaez, M. (July, 2009).  A Practitioner’s Field Guide to Developing Effective Language trainning Programs Using Relational Frame Theory (RFT): Part I-The Basics of RFT.  In T. Weil (Chair), Invited workshop (with N. Berens, T. Weil & C. Luciano) delivered at the World Conference III of the Association for Behavioral Science, Amsterdam, Holland. 

Pelaez, M. (July, 2009).  Los Asombrosos  Efectos del Tacto en Infantes”,  Invited Address delivered at Congreso Colombiano de Pediatría, Cartagena, Colombia. 

Pelaez, M. (June, 2009).  Intervenciones Tacto en Infantes. Taller de capacitaciones a enfermeras en las ciudades de Bogotá y Cali. Actividades llevadas a cabo del 30 de junio al 4 de Julio de 2009. (Workshops enrolled about 15 people each. The National Conference of Pediatrics had more than 300 attendees, including nurses and doctors). 

Pelaez, M (December, 2008). Aproximación conductual al desarrollo: Aplicaciones e intervenciones tempranas. In J. Virués, Chair, seminar delivered at the Master Program in Behavior Analysis of Autism Spectrum Disorders, Madrid, Spain. 

Pelaez, M. (May, 2008a).  Touch and Massage, Part I: Research and Therapeutic Benefits.  In How Ti Hwei, Chair, invited address delivered for the Vietnam Pediatric Association and the Johnson & Johnson Asia Pacific Series, Ho Chi Min City, Vietnam. 

Pelaez, M. (May, 2008b).  Touch and Infant Massage, Part II: Training the Trainers.  Invited address delivered for the Vietnam Pediatric Association and the Johnson & Johnson Asia Pacific Series, Ho Chi Min, Vietnam. 

Pelaez, M. (May, 2008c).  Touch and Massage, Part I: Research and Therapeutic Benefits.  Workshop delivered for the Johnson & Johnson Asia Pacific Series, Sydney, Australia. 

Pelaez, M. (May, 2008d).  Touch and Infant Massage, Part II: Training the Trainers.  Workshop delivered for the Johnson & Johnson Asia Pacific Series, Sydney, Australia. 

Pelaez, M. (April, 2008).  La Conducta Increible del Infante: Un Enfoque Basado en el Aprendizaje. Invited address delivered at the 1er. Seminario Internacional sobre Comportamiento y Aplicaciones (First International Seminar on Behavior and Applications), Centro Universitario de Ciencias Biológicas y Agropecuarias y Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Jalisco, México. 

Pelaez, M. (November, 2007).  Intervenciones Analítico–Conductuales con Infantes en Riesgo.  Invited address delivered at the XVIII Mexican Congress of Behavior Analysis, University of Veracruz (Universidad Veracruzana), Xalapa, Ver, México. 

Pelaez, M. (August, 2007).  The Nature of Causation Human Development.  In M. Pelaez (Chair) & M. Dougher (Discussant), Description, Explanation, and Causation:  A Host of Conceptual Confusions in Behavior Analysis of Development.  Symposium conducted at the International Association for Behavior Analysis Conference, Sydney, Australia. 

Pelaez, M. (October, 2006).  The Amazing Effects of Touch on Human Behavior.  Invited address delivered at the annual meeting of the Southeastern Association for Behavior Analysis, Greenville, SC. 

Pelaez, M., & Field, T (September, 2006).  Lo asombroso del  tacto:  Superando la depresión y la ansiedad (The Amazing Touch:  Overcoming depression and Anxiety). Invited address delivered at the VIII Congreso Internacional sobre el Estudio de la Conducta (8th International Congress on Behavior Studies), San Martiño Pinario, Santiago de Compostela (España) (http://www.ciec2006.com/contacto_i.html) 

Pelaez, M. (September, 2006).  Contribuciones a la Ciencia de la Conducta (Contributions to the Science of Behavior). Plenary session conducted at the VIII Congreso Internacional sobre el Estudio de la Conducta (8th International Congress on Behavior Studies), San Martiño Pinario, Santiago de Compostela (España) (http://www.ciec2006.com/contacto_i.html) 

Pelaez, M. (July, 2006).  Relational Frame Theory and Intelligence.  In E. Fox, Chair, RFT & Education II.  Symposium conducted at the Second World Conference on Acceptance & Commitment Therapy, Relational Frame Theory and Contextual Behavioral Science, London, UK. (http://www.contextualpsychology.org/world_conference2) 

Pelaez, M. (July, 2006). The Amazing Infant:  Early Learning of Relational Frames.   Invited Address delivered at the Second World Conference ACT, RFT, and Contextual Behavioural Science, University College London, UK. (http://www.contextualpsychology.org/world_conference2) 

Pelaez, M. (July, 2006). Infant Social Learning.  Invited Address delivered at the meeting of the European Association for Behavior Analysis (EABA), Milan, Italy, 2006. 

Pelaez, M. (July, 2006).  Child Learning and Mechanistic Contextualism: Research. In M. J. Marr (Chair).  Symposium conducted at the meeting of the European Association for Behavior Analysis (EABA), Milan, Italy. 

Pelaez, M., Gewirtz, J., & Mahabir, N. (June, 2006). Exploring Stimulus Equivalence Formation in Infants. Paper delivered at the University of Lille, J. C. Darcheville research laboratory, Department of Psychology, Lille, France. 

Pelaez-Nogueras, M. (July, 2005).  Etapas del Desarrollo Infantil e Investigaciones Recientes (Recent Investigations on Infant Stages of Development).  In L. A. Perez-Gonzalez, Chair, Enseñanza de niños con autismo, syndrome de Asperger y otros transtornos generalizados del desarrollo, University of Oviedo, Oviedo, Spain. 

Pelaez, M. (May, 2005).  Sources of Novel Behavior:  Implications in the Development of Verbal Behavior.  International Panel Discussion on C. Catania’s invited address, at the annual meeting of the Association for Behavior Analysis, Chicago, IL. 

Pelaez, M. & Gonzalez, K. M (November, 2005). Deconstructing Accountability in Higher Education: A Behavioral Perspective.  Paper delivered at the International Conference for Behavior Analysis, Beijing, China. 

Pelaez, M., Gewirtz, J. L., & Volaire, M. (November, 2005).  Infant Responding Compared Under Conjugate and Continuous Reinforcement Schedules. Paper presented at the International Conference for Behavior Analysis, Beijing, China. 

Pelaez, M., & O’Hora, D. (August, 2004).  Relational Frames and Human Intelligence (Relational Frames e Inteligência Humana).  In M. Pelaez (Chair) and M. Dougher (Discussant), Relational Frame Theory, Human Intelligence, and Language, symposium conducted at the Second International Conference of the Association for Behavior Analysis, Campiñas, Brazil. 

O’Hora, D., Pelaez, M., Barnes-Holmes, D., Robinson, K. & Chaudhary, T. (2004).  Responding in accordance with before and after relations and performance on the WAIS-III.  Paper presented as part of the symposium “Issues in the Experimental Analysis of Human Language” (O’Hora) at the annual convention of the Psychological Society of Ireland, Cork, Ireland. 

O’Hora, D., Pelaez, M., Barnes-Holmes, D., & Robinson, K. (August, 2004).  Temporal Relational Frames and the WAIS-III (Relational Frames Temporais e o WAIS-III). In M. Pelaez (Chair) and M. Dougher (Discussant), Relational Frame Theory, Human Intelligence, and Language, symposium conducted at the Second International Conference of the Association for Behavior Analysis, Campiñas, Brazil. 

Pelaez, M. (2004, July). Methodological Procedures to Improve Mother–Infant Interactions. In Carlo Brunetti (Chair), Invited Address delivered at the University of Parma, Italy. 

Pelaez, M. (2004, June).  Verbal intelligence and the ability to derive relations. In R. Malott (Chair), Invited Address delivered at the Seventh International Congress of Behavior Studies, Engelberg, Switzerland. 

Pelaez, M.  (2004, June).  Early development of communication and behavioral systems.  In P. Moderato & P. Harzem (Chair & Discussant), A behavioral systems approach to development:  Theory, research, and application.  Symposium conducted at the International Congress of Behavior Studies, Engelberg, Switzerland. 

Pelaez, M., O’Hora, D., & Barnes-Holmes, D. (2004, March).  Performance on a Derived Relational Responding task Predicts Performance on Verbal Sub-tests of the WAIS-III.  In L. Fields (Chair), Invited Colloquium delivered at the City University of New York (CUNY), Queens, NY.  

Pelaez, M. (2004, February). The role of maternal responding on infant language learning.  In J. Howard (Chair), Invited Colloquium delivered at California State University, Stanislaus, CA. 

Pelaez, M. (2003, August).  Language and cognition. Discussant of symposium conducted at the ACT, RFT and The New Behavioral Psychology Conference, Linköping, Sweden. 

Pelaez, M. O’Hora, D., & Barnes-Holmes, D. (2003, August).  Relational frame theory and language: Evidence form the experimental analysis of human behaviour. In D. Barnes-Holmes (Chair & Discussant), RFT, Language and Learning.  Symposium conducted at the ACT, RFT and The New Behavioral Psychology Conference, Linköping, Sweden. 

O’Hora, D. Pelaez, M., & Barnes-Holmes, D. (2003, August).  A comparison between performance on a relational framing task and performance on verbal ability subscales of the WAIS-III.   In D. Barnes-Holmes (Chair & Discussant), RFT, Language and Learning.  Symposium conducted at the ACT, RFT and The New Behavioral Psychology Conference, Linköping, Sweden. 

Pelaez, M., O’Hora, D., & Barnes-Holmes, D. (2003, July). Theoretical underpinnings of “derived relational responding” and “equivalence relations” and their role on language performance. In M. Pelaez (Chair), symposium conducted at the First conference of the European Association for Behavior Analysis, Parma, Italy. 

O’Hora, D., Pelaez, M., & Barnes-Holmes, D. (2003, July).  Performance on derived relational responding tasks predicts performance on verbal sub-tests of the WAIS-III. In M. Pelaez (Chair), symposium conducted at the First conference of the European Association for Behavior Analysis, Parma, Italy. 

Pelaez-Nogueras, M. (2003, July). Etapas del desarrollo infantile (stages of child development). Seminar delivered at the “LXIII Cursos de Verano Extensión Universitaria, Universidad de Oviedo, Asturias, Spain. 

Pelaez-Nogueras, M. (2003, July). Etapas del desarrollo infantile e investigaciones recientes (recent research on stages of child development). Seminar delivered at the “LXIII Cursos de Verano Extensión Universitaria, Universidad de Oviedo, Asturias, Spain. 

Pelaez-Nogueras, M. (2003, July). El lenguaje y su adquisición (language acquisition). Seminar delivered at the “LXIII Cursos de Verano Extensión Universitaria, Universidad de Oviedo, Asturias, Spain. 

Williams, G., Spradlin, J., Pelaez-Nogueras, M., Perez-Gonzalez, L.A. (2003, July).  Intervenciones effectivas en España para enseñar a niños con dificultades de aprendizaje.  Symposium conducted at the “LXIII Cursos de Verano Extensión Universitaria, Universidad de Oviedo, Asturias, Spain. 

Pelaez, M. (2002, September).   A Taxonomy of Rules and Rule-Following as a Function of Psychological Development and Language Comprehension. Invited Address to be delivered at the Sixth International Congress on Behaviorism and the Sciences of Behavior, Auburn, AL. 

Pelaez, M., & Gewirtz, J. L. (2002, September). Age the irrelevant variable.  In E. Morris (Chair), Honoring Donald Baer.  Invited Symposium conducted at the Sixth International Congress on Behaviorism and the Sciences of Behavior, Auburn, Alabama, USA. 

Pelaez, M. (2002, July). Research Project:  Instructional Control and Relational Framing Across Cultures as a Function of Language, Mathematical, and Spatial Skills, at National University of Ireland, Maynooth. 

Pelaez, M. (2001, November).  The onset of language development:  Natural selection, adaptation, and primary reinforcers.  In P. Harzem (Chair & Discussant), Language Acquisition:  Natural Selection and Language Disabilities.  Symposium conducted at the First International Conference of the Association for Behavior Analysis, Venice, Italy. 

Pelaez, M. (2001, November).  On the parallelisms between scientific behavior and moral behavior as rule-governed systems. In G. Novak (Chair) and J. L. Gewirtz (Discussant), Morality: Theoretical Issues.  Symposium conducted at the First International Conference of the Association for Behavior Analysis, Venice, Italy. 

Pelaez, M., Figueroa-Rodriguez, S., Luna-Dominguez, T. J. P. (2001, November).    Induction of imitative behavior in preschool children through contingent imitation of children’s verbal responses.  In P. Moderato (Chair), Verbal behavior in preschool and autistic children. Symposium conducted at the First International Conference of the Association for Behavior Analysis, Venice, Italy. 

Pelaez, M., Lubián, J., McIlvane, W., & Dube, W. (2001, November).  Training discrimination, relfexivity, mixed identity matching, generalized identity matching, and arbitrary matching in infants; Towards the “emergence” of stimulus equivalence.  Poster presented at the First International Conference of the Association for Behavior Analysis, Venice, Italy. 

Pelaez, M. (2001, July). Basic learning processes in infancy: Potential precursors of relational responding.  Paper delivered at the National University of Ireland, Maynooth. 

Pelaez, M. (2001, July).  Psicología y análisis conductual del desarrollo del niño. In L.A. Pérez-González (Chair), Instrumentos para la Enseñanza de Niños con Dificultades de Aprendizaje (Cod. 1680.12).  Invited Seminar delivered at the University of Oviedo, Spain. 

Pelaez, M. (2001, July).  El desarrollo social en el niño. In L.A. Pérez-González (Chair), Instrumentos para la Enseñanza de Niños con Dificultades de Aprendizaje (Cod. 1680.12).  Invited Seminar delivered at the University of Oviedo, Spain. 

Pelaez, M. (2001, July).  Procesos significativos del aprendizaje infantil. In L.A. Pérez-González (Chair), Instrumentos para la Enseñanza de Niños con Dificultades de Aprendizaje (Cod. 1680.12).  Invited Seminar delivered at the University of Oviedo, Spain. 

Pelaez, M. (2001, July).  Psicología y análisis conductual del desarrollo del niño. In L.A. Pérez-González (Chair), Instrumentos para la Enseñanza de Niños con Dificultades de Aprendizaje (Cod. 1680.12).  Invited Seminar delivered at the University of Oviedo, Spain. 

Pelaez, M. (2001, July). Aspectos fundamentales del desarrollo implicados en la educación de niños con problemas de aprendizaje. In L.A. Pérez-González (Chair), Instrumentos para la Enseñanza de Niños con Dificultades de Aprendizaje (Cod. 1680.12).  Invited Seminar delivered at the University of Oviedo, Spain. 

Pelaez, M. (2001, July).  El futuro de la enseñanza de niños con problemas de aprendizaje.  Instrumentos para la Enseñanza de Niños con Dificultades de Aprendizaje (Cod. 1680.12).  Round Table conducted at the University of Oviedo, Spain. 

Pelaez, M. (2001, May).  Desarrollo Social Infantil en Familias Depresivas. Invited Address at the Auditory of the Museum of Antropology, open to the entire University system and sponsored by the Universidad Veracruzana, Xalapa, Veracruz, México. 

Pelaez, M. (2001, April). Aprendizaje social infantil.  Workshop delivered at the XXVIII Congress of the Technological Institute of Sonora titled: Psicología y su Impacto en la Transformación de la Sociedad, Cidudad Obregón, Sonora, México. 

Pelaez, M. (2001, April). Intervenciones analítico-conductuales con infantes en riesgo de retraso en el desarollo.  Invited Address delivered at the XXVIII Congress of the Technological Institute of Sonora titled “Psicología y su impacto en la Transformación de la Sociedad, Cidudad Obregón, Sonora, México. 

Pelaez, M. & Kleinberg, E. (2001, April). El analista conductual: Un observador neutral? Paper delivered by E. Kleinberg at the XXVIII Congress of the Technological Institute of Sonora titled “Psicología y su impacto en la Transformación de la Sociedad, Cidudad Obregón, Sonora, México. 

Pelaez, M. & Kleinberg, E. (2001, March).  Behavioral scientist:  An innocent bystander?  Invited Paper presented at the XIII International Society for Behaviorology, Chicago, Illinois, USA. 

Pelaez, M. (2000, November).  Early Behavior-Analytic Interventions with Infants At- Risk of Developmental Delays.  Invited Address to be deliver at the Special International Congress on Behaviorism and the Sciences of Behavior, Taipei, Taiwan. 

Pelaez, M. (2000, November).  Morality is rules and empathy.  In M. Pelaez (Chair) and G. Novak (Discussant), Morality, Religion, and the Science of Behavior.  Symposium to be conducted at the Special International Congress on Behaviorism and the Sciences of Behavior, Taipei, Taiwan. 

Pelaez, M., & Paneque, O. (2000, October).  Reducing language mixing among preschool age children raised in bilingual environments.  Paper presented at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Ver, México. 

Rodriguez, I., Montgomery, M., & Pelaez-Nogueras, M. (2000, October).  Cross-cultural and gender comparisons of love attitudes in late adolescence.  Poster presented at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Ver, México. 

Cortés-Rodriguez, R., Pelaez-Nogueras, M., Reyes Hernández, G. (2000, October). Estímulos visuales en un texto y sus efectos en la discriminación y comprensión lectora.  Poster presented at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Veracruz, México. 

Pelaez, M. (2000, October).  The role of the behavior-analytic conception of rules in the development of moral behavior.  In J. L. Gewirtz (Chair), Moral development today. Symposium conducted at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Veracruz, México. 

Martinez, H., & Pelaez, M. (2000, October).  El papel de las descripciones verbales en el control de la conducta compleja:  Efectos de la retroalimentación.  In H. Martinez (Chair), “Análisis experimental de los efectos de las descripciones verbales sobre la ejecución.”  Symposium conducted at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Veracruz, México. 

Herrera, G., Pelaez, M., & Reyes, G. (2000, October).  Seguimiento de reglas en función del desarrollo psicológico y la comprensión del lenguaje.  Paper presented at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Veracruz, México. 

Pelaez, M., & Moreno, R. (2000, October).  Self-verbalized rules facilitate transfer learning.  In H. Martinez (Chair), “Análisis experimental de los efectos de las descripciones verbales sobre la ejecución.”  Symposium conducted at the International Congress on Behaviorism and the Sciences of Behavior, Xalapa, Ver, México. 

Pelaez, M., Sanchez, A., Gewirtz, J. L., & Mahabir, N. (2000, July).  Stimulus equivalence and its relation to language development.  Poster presented at the International Conference on Infant Studies (ICIS), Brighton, England. 

Mahabir N. M., Pelaez, M., Cárdenas C., & Calvani T. (2000, July).  Motherese speech and adult vocal imitation as effective combined treatments to elicit and increase infant rate of vocalizations.  Poster to be presented at the International Conference on Infant Studies (ICIS), Brighton, England. 

Pelaez, M. & Gewirtz, J. L. (2000, July).  Infant social referencing due to respondent and operant learning processes.  Poster to be presented at the International Conference on Infant Studies (ICIS), Brighton, England. 

Pelaez, M. & Moreno, R. (2000, July).  Self-verbalized rules facilitate transfer learning in extramodal and extrarelational higher-order testing.  In M. Pelaez (Chair) and Fraçois Tonneau (Discussant), Verbal Behavior and Transfer Of Learning In Conditional Discrimination Procedures.  Symposium conducted at the 4th European Meeting for the Experimental Analysis of Behaviour (EMEAB), Amiens, France. 

Pelaez, M. (2000, July).  Discrimination learning processes in infancy.  In J. L. Gewirtz (Chair), symposium titled: Respondent and Operant Learning, and Their Interactions, in Human Infants. Symposium conducted at the 4th European Meeting for the Experimental Analysis of Behaviour (EMEAB), Amiens, France. 

Martinez, H., Ortiz, G., Tamayo, R. & Pelaez, M. (2000, July).  Interactions of instructional accuracy and history, verbalizations and counting performance in conditional discrimination.   In M. Pelaez (Chair) and Fraçois Tonneau (Discussant), Verbal Behavior and Transfer of Learning In Conditional Discrimination Procedures.  Symposium conducted at the 4th European Meeting for the Experimental Analysis of Behaviour (EMEAB), Amiens, France. 

Pelaez, M. (July, 2000). El desarrollo evolutivo de los niños clasificados como normales. Seminar delivered in L. A. Pérez-González (Chair), Avances Recientes en al Enseñanza de Niños con Problemas de Aprendizaje, University of Oviedo, Spain. 

Pelaez, M. (July, 2000). Avances recientes en el estudio del desarrollo infantil.  Seminar delivered in L. A. Pérez-Gonzalez (Chair), Avances Recientes en al Enseñanza de Niños con Problemas de Aprendizaje, University of Oviedo, Spain. 

Pelaez, M (July, 2000). Aspectos fundamentales del desarrollo implicados en niños con problemas de parendizaje. Seminar delivered in J. L. Pérez-Gonzalez (Chair), Avances Recientes en al Enseñanza de Niños con Problemas de Aprendizaje, University of Oviedo, Spain. 

Pelaez, M. (July, 2000). El futuro de la enseñanza de niños con problemas de aprendizaje. Round table conducted in J. L. Pérez-Gonzalez (Chair), Avances Recientes en al Enseñanza de Niños con Problemas de Aprendizaje, University of Oviedo, Spain. 

Pelaez, M. (1999, October).  Feminism and Science.  Invited paper presented at the III Taller Internacional Mujeres en el Umbral del Siglo XXI. Cátedra de la Mujer. Universidad de La Habana, Cuba. 

Pelaez, M. (1999, June). A taxonomy of rules and their correspondence to rule-governed behavior.  Paper delivered at the Jean Piaget Society conference, Acapulco, México. 

Pelaez, M. (1999, February). Análisis de la conducta del desarrollo:  Historia, teoría e investigación.  XIV Congreso Mexicano y II Ibero e Interamericano de Análisis de la Conducta.  Universidad de Guadalajara, Mexico y Sociedad Mexicana de Análisis de la Conducta, Guadalajara, Jalisco, México. 

Pelaez-Nogueras, M. (1998, November).  Infant social learning:  A behavior-analytic approach.  Invited Presentation (seminar) delivered at the University of Almería, Andalucía, Spain. 

Pelaez-Nogueras, M. & Moreno, R. (1998, November).  A taxonomy of rules and their correspondence to rule-governed behavior.  In M. Pelaez (Chair), Invited Symposium, Conceptual and Experimental Analysis of Rules and Rule Governed Behavior conducted at the International Conference on Behaviorism and the Sciences of Behavior, Seville, Spain.  

Crooks, N. A., Pelaez-Nogueras, M., Gewirtz, J. L., Markham, M. R., & Galindo, J. (1998, November).  Description of contingent-relations of a conditional discrimination task facilitates rule following in a generalization task.  Poster presented at the International Conference on Behaviorism and the Sciences of Behavior, Seville, Spain.  

Pelaez-Nogueras, M., Otero, M., & Carvalho, M. (1998, November).  Experimental procedures for identifying reinforcing-stimuli preferences in infants.  Poster presented at the International Conference on Behaviorism and the Sciences of Behavior, Seville, Spain.  

LumLock, K., Gewirtz, J. L., & Pelaez-Nogueras, M. (1998, April).  Infant’s approach and avoidance to strangers influenced by maternal contingencies. In J. L. Gewirtz, Chair and L. Lipsitt & M. Pelaez-Nogueras (Discussants), Environmental influences on fearful behavior in infants.  Symposium conducted at the 11th Biennial International Conference on Infant Studies (ICIS), Atlanta, Georgia, USA. 

Pelaez-Nogueras, M. (1998, April).  Assessing social and nonsocial reinforcers:  Contributions of contemporary conditioning studies with infants.  In J. L. Gewirtz, Chair & C. Rovee-Collier (Discussant).  The Nature of Reinforcement.  Symposium conducted at the 11h Biennial International Conference on Infant Studies, Atlanta, Georgia, USA. 

Sanchez, I. A., Gewirtz, J. L., & Pelaez-Nogueras, M. (1998, April).  Determinants of fear-denoting protests in darkness and illuminated settings.  In J. L. Gewirtz, Chair and L. Lipsitt & M. Pelaez-Nogueras (Discussants), Environmental influences on fearful behavior in infants.  Symposium conducted at the 11h Biennial International Conference on Infant Studies, Atlanta, Georgia, USA. 

Pelaez-Nogueras, M. (1997, September).  Maternal depression and its effects on infant learning and development.  Invited paper to be delivered at the XXVII Congress of European Association for Behavioural & Cognitive Therapies, Venice, Italy. 

Pelaez-Nogueras, M. (1997, July).  Touch effects in mother-infant interactions.  Paper delivered at the Third European Meeting for the Experimental Analysis of Behavior, Dublin, Ireland. 

Pelaez-Nogueras, M. (1997, July).  Rule-governed behavior and moral development.  Invited presentation at the University of Seville, Spain. 

Pelaez-Nogueras, M. (1996, October).  The behavior of scientists:  Cultural practices among psychologists and behavior analysts.  In M. Pelaez-Nogueras (Discussant and Chair), symposium conducted at the Third International Congress in Behaviorism and the Sciences of Behavior, Yokohama, Japan. 

Pelaez-Nogueras, M. (1996, October).  Multiple influences in behavioral interactions.   Invited address delivered at the Third International Congress in Behaviorism and the Sciences of Behavior, Yokohama, Japan. 

Pelaez-Nogueras, M. (1996, August). The social study of science:  A challenge to behavior analysis an experimental psychology.  In M. Galizio (Chair), Invited address presented at Annual Conference of the American Psychological Association (APA), Toronto, Canada. 

Pelaez-Nogueras, M., Gewirtz, J. L., Markham, M. M., Santos, R., & Baxter, J.  (1996, June).  Infant vocal responses are conditioned both by maternal imitation and motherese speech.  Poster presented at the biannual meeting of the Mexican Society for Behavior Analysis (SMAC) and the First Interamerican Congress of Behavior Analysis, Veracruz, Ver, México. 

Pelaez-Nogueras, M. (1996, June).  Infants of depressed mothers do not develop a depressed mood of interaction.  Poster presented at the biannual meeting of the Mexican Society for Behavior Analysis (SMAC) and the First Interamerican Congress of Behavior Analysis, Veracruz, Ver, México. 

Pelaez-Nogueras, M. (1996, June).  Rule-governed behavior:  A developmental approach.  An Invited address delivered at the biannual meeting of the Mexican Society for Behavior Analysis (SMAC) and the 13th Mexican Congress, and the First Interamerican Congress of Behavior Analysis, Veracruz, Ver, México. 

Pelaez-Nogueras, M. (1996, April).  Recent research using operant learning procedures.  Discussant in J. L. Gewirtz and L. P. Lipsitt (Chairs) Invited symposium at the International Conference on Infant Studies (ICIS), Providence, RI. 

Pelaez-Nogueras, M., Cigales, M., Gonzalez, A. & Clasky, S. (1996, April).  Some myths about infant “depression”:  Infants of depressed mothers do not develop a “Depressed Mood” of interaction.  Poster presented at the International Conference on Infant Studies (ICIS), Providence, RI. 

Pelaez-Nogueras, M., Gewirtz, J. L., Markham, M. M., Santos, R. & Baxter, J.  (1996, April).  Infant vocal responses are conditioned both by maternal imitation and motherese speech.  Poster presented at the International Conference on Infant Studies, Providence, RI. USA. 

Pelaez-Nogueras, M. (1996, March).  Rules that control moral action. Paper delivered at the Annual meeting of the Experimental Analysis of Behavior Group (EABG), London, England. 

Pelaez-Nogueras, M. (1995, August).  Behavior analysis in infancy.  In E. Ribes–Iñesta (Chair) invited colloquium delivered at the University of Guadalajara, Center of Psychological Research, Guadalajara, México. 

Pelaez-Nogueras, M., & Gewirtz, J. L. (1995, April).  Infant vocal responses as a function of maternal imitation.  Poster presented at the Annual Meeting of the Experimental Analysis of Behavior Group (EABG), London, England. 

Pelaez-Nogueras, M. (1994, October). Contextualism in behavior analysis of development:  Upon further reflection.  Paper presented at the Second International Congress on Behaviorism and the Sciences of Behavior, Palermo, Italy. 

Pelaez-Nogueras, M. (1994, October). Rule-Governed Behavior.  In P. Moderato (Chair), Symposium conducted at the Second International Congress on Behaviorism and the Sciences of Behavior, Palermo, Italy. 

Pelaez-Nogueras, M. (1994, June).   Rhythmic versus intrusive touch of depressed mothers.  In T. Field (Chair), Touch in infancy.  Second annual symposium conducted at Pre-International Conference of Infant Studies (ICIS), Paris, France. 

Pelaez-Nogueras, M. (1994, June).  Equivalence-class formation and emergent relations.  In P. Moderato (Chair) and M. Pelaez (Discussant).  Symposium conducted at the International Conference of Infant Studies (ICIS), Paris, France. 

Pelaez-Nogueras, M. (1993, August).  The impact of operant learning paradigms on contemporary infant research.  In B. Etzel (Chair), paper session conducted at the annual meeting of the American Psychological Association (APA, Divisions 7 & 25), Toronto, Ontario, Canada. 

Gewirtz, J. L., & Pelaez-Nogueras, M. (1992, May).  Infant social referencing as a learned process.  In J. L. Gewirtz (Chair), Contemporary perspectives on social referencing.  Invited symposium conducted at the meeting of the International Conference for Infant Studies (ICIS), Miami, Florida, USA. 

Pelaez-Nogueras, M. (1992, May). The Maternal Response Pattern determines Infant Protests during Departure and Separations.  In M. J. Levitt (Chair), Infant separation protest, distress, and recovery in day care and laboratory settings.  Symposium conducted at the meeting of the International Conference for Infant Studies (ICIS), Miami, Florida, USA. 

Pelaez-Nogueras, M. (1992, May).  Infant learning to reference maternal emotional cues.   Paper presented at the meeting of the International Conference on Infant Studies (ICIS), special session for Dissertation Awards, Miami, Florida, USA. 

Gewirtz, J. L. & Pelaez-Nogueras, M. (1992, February).  Behavior Analysis of Developmental Processes.  In E. Ribes–Iñesta (Chair), Symposium conducted at the biennial meeting of Behaviorism and the Sciences of Behavior, Universidad de Guadalajara, Guadalajara, México. 

Pelaez-Nogueras, M., & Gewirtz, J. L. (1991, March).  Maternal facial emotional expressions as conditioned cues for referencing.  Paper presented at the meeting of the Mexican Society of Behavior Analysis (SMAC), México City, México. 

Pelaez-Nogueras, M. (1991, March).  On misunderstandings of behavior analysis of child development.  In V. García (Chair), Behavior analysis of child development.  Symposium conducted at the meeting of the Mexican Society of Behavior Analysis (SMAC), México City, México. 

Gewirtz, J. L., Weber, R., & Pelaez-Nogueras, M. (1990, April).  The role of facial characteristics in neonate gender discrimination from photographs.  Poster presented at the International Conference for Infant Studies (ICIS), Montreal, Canada. 

Gewirtz, J. L., & Pelaez-Nogueras, M. (1990, April). Complications of uncontrolled mother/stranger contingencies in maternal departures and in the strange situation: A functional analysis.  In N. Fox (Chair), Attachment measured by the strange situation: New directions.  Symposium conducted at the International Conference for Infant Studies (ICIS), Montreal, Canada. 

Pelaez-Nogueras, M., & Gewirtz, J. L. (1989, March). Discrimination Training of Infant Protest Between Maternal-Departure and Maternal-Separation Contexts. Invited paper presented at the meeting of the Mexican Society of Behavior Analysis (SMAC), Hermosillo, Sonora, México. 

Gewirtz, J. L., & Pelaez-Nogueras, M. (1988, April).  Infant Protests to Maternal Departures/Separations as a Learned Response.  In J. L. Gewirtz (Chair), Development and control of infant separation distress.  Symposium conducted at the International Conference for Infant Studies (ICIS), Washington, D.C. USA. 

Pelaez-Nogueras, M., & Gewirtz, J. L. (1987, October).  Mothers’ vocal imitation as a reinforcer for infant vocalizations with yoked control for elicitation.  Paper presented at the meeting of the Mexican Society of Behavior Analysis (SMAC), Puebla, Puebla, México.  

Pelaez-Nogueras, M., & Gewirtz, J. L (1986,March).  Las respuestas maternas contingentes y sus efectos en el llanto operante infantil [Contingent maternal responding and its effects on the operant crying of their infants] Paper presented at the meeting of the Mexican Society of Behavior Analysis (SMAC), Veracruz, Ver., México.