Research

Here at David Gregory School, we continually contribute to the body of research in autism and developmental disabilities. Our research focuses on verbal behavior, classroom applications of behavior analysis, parent training, and teacher training. These research efforts are led by Dr. Gladys Williams, an internationally renowned ABA Specialist who earned her doctoral degree in Special Education and Behavior Analysis from Columbia University in New York City.

Research articles from our program have been published in the journals of Applied Behavior Analysis, American Journal on Mental Retardation, Teaching Exceptional Children, Behavioral Residential Treatment, and Psicothema (the behavioral journal in Spain). Papers and posters have been presented by Dr. Williams around the world at symposia and the yearly conferences organized by the Association of Behavior Analysis, since 1985.

Currently we are utilizing research strategies and techniques to facilitate language emergence in non-verbal children.

The following research from David Gregory School has been used in educating and training teachers and psychologists around the world to facilitate learning and implement individualized ABA programs for children with developmental delays and autism.

PUBLICATIONS

Williams, G., Carnerero, J. J., & Pérez-González, L. A. (2006). Generalization of tacting actions in children with autism. Journal of Applied Behavior Analysis. 39, 233-237.

Williams, G., Pérez-González, L. A., & Vogt, K. (2003). The role of specific consequences in the maintenance of three types of questions. Journal of Applied Behavior Analysis. 36, 285-296.

Pérez-González, L. A., & Williams, G. (2002). A multi-component procedure to teach conditional discriminations to children with autism. American Journal on Mental Retardation. (107) 4,
293-301.

Williams, G., Donley, C. & Keller, J. (2001). Teaching children with autism to ask questions about hidden objects.Journal for Applied Behavior Analysis. 33, 627-630.

RESEARCH PAPERS AND POSTERS PRESENTED AT CONVENTIONS

Williams, G., Wuensch, S. J., & Centra, C. (January, 2012). Increasing Mands During Small Groups In A Special Needs School. Paper presented at the 2012 ABAI Autism Conference, Philadelphia, PA.

Williams, G., Wuensch, S. J., Fernandez-Vuelta, M. & Gomez-Verdugo, M. B. (May, 2011). A Novel Procedure Teach Discrimination Of Common Objects: Combining The Exclusion Procedure With Whole Blocking Procedure. Poster presented at the 37th ABAI’s Annual Convention in Denver, Colorado, 2011.

Williams, G., Wuensch, S. J., & DeMauro, M. (May, 2011). A Replication Of A Study To Reduce Palilalia. Poster presented at the 37th ABAI’s Annual Convention in Denver, Colorado, 2011.

Williams, G., Wuensch, S., & Gómez Verdugo, B. (February, 2011). Reducing Palilalia by Presenting Tact Corrections: a Replication Study. 4th International CABAS Conference, New York. N.Y.

Williams, G., Luciano, M. C., Rodriguez-Mori, M., & Wuensch, S. (May, 2010). Teaching Children with Autism the Generalized Meaning of Singular–Plural Relations of Nouns. Paper presented at the 36th Annual Convention of the Association for Behavior Analysis International (IABA), San Antonio, Texas.

Gómez-Verdugo, B., Williams, G., Carew, H., & Schack, K. (October, 2010). Echoic extension: A procedure to Teach Echoic Repertoire. A poster presented at the 28th Annual Autism New Jersey conference, New Jersey (USA).

Williams, G., Stephen John Wuensch & Gómez-Verdugo, Belen (October, 2010). Teaching Auditory-Visual Discrimination of Common Objects Combining the Exclusion Procedure with Whole Blocking Procedure. A poster presented at the 28th Annual Autism New Jersey conference, New Jersey, (USA).

Williams, G., Rodriguez-Mori, M., & Vogt, K. (August, 2009). Teaching A Tact Repertoire From Words To Full Sentences In Children With Autism. A talk given at the 5th International Conference of the Association for Behavior Analysis, Oslo.

Williams, G., Rodriguez-Mori, M., Vogt, K., & Fernandez-Vuelta, M. (May, 2009). Teaching Children with Autism to Ask Question About Unknown Auditory Stimuli. Poster presented at the 35th Annual Convention of the Association for Behavior Analysis, Tuzson, AR (USA)

Williams, G., Rodriguez, Mori, M., Wensch, J. (February, 2009). Can Children With Autism Learn To Inquire About Unknown Auditory Stimuli?. Poster presented at the ABA International Autism Conference, Jacksonville, FL.

Williams, G., Carvallho de Matos, D., Quiroz, A. B. & Vogt, K. (February, 2008). An Analysis of Pre-Requisite Skills for The Emergence of Object Description. A talk given at the 4th Conference of the European Association for Behaviour Analysis, Madrid, Spain.

Williams, G., Mallada,C., Rodriguez, C., Wuensch, S.J. (September, 2008). Teaching Conditional Discriminations Using Multiple Exemplars and The Whole Blocking Procedure. 4th Conference of the European Association for Behaviour Analysis, Madrid, Spain.

Williams, G., Muller-Queiroz, A., Rodriguez-Mori, M., Vogt, K., Carvalho-Matos, D., Fernandez-Vuelta, M., & Vinueza, G., (May, 2008). Prerequisite Skills for the Emergence of Object Description. Poster presented at the 34th Annual Convention of the Association for Behavior Analysis, Chicago.

Williams, G., Muller-Queiroz, A., Williams-Keller, J., Carvalho de Matos, D., & Vogt, K. (May, 2008). Tacting It is and It is not in a MTS task using color discrimination. Poster presented at the 34th Annual Convention of the Association for Behavior Analysis, Chicago.

Williams, G., Rodriguez-Mori, M., Vogt, K., Wuensch, S., & Mekjian, L. (May, 2008). Using the Whole Blocking Procedure with Multiple Exemplars to Teach Object Selection. Poster presented at the 34tn Annual Convention of the Association for Behavior Analysis, Chicago.

Williams, G., Muller-Queiroz, A., Vogt, K., Williams-Keller, J., Rodriguez, Suarez-Valgrande, C. (May, 2008). Teaching to Discriminate the Personal Pronouns You and I in children with autism. Paper presented at the 29th annual International Conference on Developmental and Learning Disabilities – National Institute for people with Disabilities, New York, NY.

Williams, G., Muller-Queiroz, A., Vogt, K., Carvalho de Matos. D., Vogt, K., Mallada – Rodriguez, C. (May, 2008). Can Children with Autism Learn Abstraction? An Empirical Approach. Paper presented at the 29th annual International Conference on Developmental and Learning Disabilities – National Institute for people with Disabilities, New York, NY

Williams, G., Rodriguez-Mori, M., Fernancez-Vuelta, M., & Vogt, K. (February, 2008). Teaching Tacting Animals. Poster presented at the second Association for Behavior Analysis, Autism conference, Atlanta, GA.

Williams, G., Rodriguez-Mori, M., Fernancez-Vuelta, M., Muller-Queiroz, A., & Vogt, K. (February, 2008). Teaching Abstraction to Children with Autism. Poster presented at the second Association for Behavior Analysis, Autism conference, Atlanta, GA.

Williams, G., Vogt, K., Mekjian, L., & Wuensch, S. (February, 2008). Using the Whole Blocking Procedure with Multiple Exemplars to teach Object Selection. Poster presented at the second Association for Behavior Analysis, Autism conference, Atlanta, GA.

Williams, G., Muller-Queiroz, A., & Vogt, K., Williams-Keller, J., & Rodríguez, Suarez-Valgrande, C. (May, 2008). Teaching to Discriminate the Personal Pronouns You and I in children with autism. Paper presented at the 33rd Annual International Conference on Mental Retardation and Developmental Disabilities. YAI National Institute for People with Disabilities. New York, NY.

Pérez-González, L. A., Williams, G. (May, 2007). Derived Verbal Relations in a Child with Autism with Severe Problems in Spoken Language. Poster presented at the 33rd Annual Convention of the Association for Behavior Analysis, San Diego.

Williams, G., Carnerero, J. J., Vogt, K., Williams-Keller, J., Fernández-Vuelta, M., & Rodriguez-Mori, M. (May, 2007). The Analysis of a Procedure to Teach Echoic Repertoire to Non-vocal Children. Poster presented at the 33rd Annual Convention of the Association for Behavior Analysis, San Diego.

Pérez-González, L. A., Williams, G., Wuensch, J. S., & Vogt, K. (April, 2007). An analysis of two procedures to study the generalization of tacting actions in children with autism. Paper presented at the Annual Conference of the Experimental Analysis of Behaviour Group. London.

Pérez-González, L. A., Williams, G. (April, 2007). Symmetrical and transitive relations in a child with autism with severe problems in spoken language. Poster presented at the Annual Conference of the Experimental Analysis of Behaviour Group. London.

Williams, G., Queiroz-Müller, A. B., & Carnerero, J. J. (August, 2004). Findings from verbal behavior research to teach children with autism. Paper presented at the second international conference on behavior analysis, Campinas, Brazil.

Williams, G., Keller, J. (April 2003). Findings from verbal behavior research to teach children with autism. 24th Annual International Conference on Developmental and Learning Disabilities “Making a Difference”, New York, NY.

Williams, G., Keller J. & Carnerero, JJ. (May 2003). Controlling Variables that Contribute to the generalization of a tact Repertoire in Children with Autism. Paper presented at the 29th Annual Convention of the Association for Behavior Analysis, San Francisco, CA.

Williams, G., (May 2003). Teaching Intraverbal Skills to Children with Autism. Paper presented at the 29th Annual Convention of the Association for Behavior Analysis, San Francisco, CA.

Williams, G. & Perez-Gonzalez, L. A. (April, 2002). A functional analysis of spontaneous language in children during the acquisition of verbal repertoire. Paper presented at the Annual Conference of the Experimental Analysis of Behaviour Group. London.

Williams, G., Verdugo-Gomez, M. B., Keller, J. & Solorsano, J. (May, 2002). The acquisition of basic language skills in children with autism. Symposium to be conducted at the YAI’s 23rd Annual International Conference on Developmental and Learning Disabilities “Making a Difference”, New York, NY.

Williams, G., Verdugo-Gomez, B., Solorsano, J., & Keller, J. (May, 2002). Teaching nonverbal children echoic repertoire using and “extended echoic” procedure. Paper to be presented 28th Annual Convention of the Association for Behavior Analysis, Toronto, Canada.

Williams, G., Gómez-Verdugo, M. B., & Leonard, M. (May, 2002). The use of a specific establishing operation to teach children to ask. Paper to be presented at the 28th Annual Convention of the Association for Behavior Analysis, Toronto, Canada.

Williams, G., & Gómez-Verdugo, M. B. (May, 2002). An analysis of collateral verbal operants during the acquisition of basic verbal operants. Paper to be presented at the 28th Annual Convention of the Association for Behavior Analysis, Toronto, Canada.

Williams, G., Keller, J., Saiz-Galdoz, J., Rodriquez-Pérez, M., Voght, K. & Pérez-González, L. A. (2001, April). Developing verbal behavior in children with autism. Paper presented at the 26th Annual International Conference on Mental Retardation and Developmental Disabilities. YAI National Institute for People with Disabilities. New York, NY.

Williams, G., Keller, J., Gómez-Toloza, G., & Pérez-González, L.A. (2001, May). Practical findings derived from the relationship between echolalia and the intraverbal behavior. Paper presented at the 27th Annual Conference of the Association for Behavior Analysis, Atlanta, GA.

Williams, G., Keller, J., Saiz-Galdóz, J., Rodriguez-Perez, M., Choo, P., Nuzzolo-Gomez, R., Medina, S., & Pérez-González, L.A. (2001, May). Overcoming the Primacy and Recency Effect to Improve Listener Behavior in Children with Autism. Paper presented at the 27th Annual Conference of the Association for Behavior Analysis, Atlanta, GA.

Williams, G., Leonard, M., Vogt, K., Keller, J., & Saiz-Galdóz, J. (2001, May). The relationship of the autoclitic behavior and the skill to ask questions. Paper presented at the 27th Annual Conference of the Association for Behavior Analysis, Atlanta, GA.

Williams, G. & Pérez-González, L. A. (2001, May). The role of specific consequences in the maintenance of different types of questions. Paper presented at the 27th Annual Conference of the Association for Behavior Analysis, Atlanta, GA.

Williams, G., Keller, W. J., & Pérez-González, L. A. (2000, October). Practical Applications of Verbal Behavior Research. The Relationship between Echolalic Behavior and Intraverbal Behavior Along the Continuum of Language Development. Paper presented at the Annual meeting of the New York State Association for Behavior Analysis, Saratoga Springs, NY.

Williams, G., Keller, J., & Meinberg, D. L. (October, 2000). An Analysis of learned language versus spontaneous language in children with autism. Paper presented at theAnnual meeting of the New York State Association for Behavior Analysis, Saratoga Springs, NY.

Williams, G., & Pérez-González, L. A. (2000, October). Manding for information: Teaching children with autism to ask questions. Paper presented at theAnnual meeting of the New York State Association for Behavior Analysis, Saratoga Springs, NY.

Williams, G., & Pérez-González, L.A. (2000, July). Relevant data of an effective program for teaching children with autism. Paper presented at theFourth European Meeting for the Experimental Analysis of Behaviour. Amiens, France.

Pérez-González, L. A., & Williams, G. (2000, May). The transfer of verbal skills in children with autism: Relationship between object discriminations and tact repertoires. Paper presented at the 26th Annual Conference of the Association for Behavior Analysis. Washington.

Williams, G., & Pérez-González, L.A. (2000, May). The relationship between echolalic behavior and intraverbal behavior. Paper presented at the 26th Annual Conference of the Association for Behavior Analysis. Washington.

Vogt, K., & Williams, G. (2000, May). An analysis of the Spontaneous Language of Children with Autism. Paper presented at the 26th Annual Conference of the Association for Behavior Analysis. Washington.

Williams, G. (2000, May). The David Gregory School. This talk was one of a series of talks presented in a symposium titled: Comprehensive behavioral schools to teach children with autism in the United States and Europe. Paper presented at the 26th Annual Conference of the Association for Behavior Analysis. Washington.

Williams, G, & Pérez-González, L.A. (1999, April). The relevance of teaching object discrimination and tacts as independent repertoires in the acquisition of verbal skills in children with autism. Paper presented at the Annual Conference of the Experimental Analysis of Behaviour Group. London, U.K.

Williams, G., Voght, K. & Pérez-González, L. A. (1999, April). Behavioral procedures to teach discriminations of objects and pictures to children with developmental disabilities. Poster session presented at the 20th Annual International Conference on Mental Retardation and Developmental Disabilities. New York, NY.

Pérez-González, L. A., & Williams, G. (1999, May). A review of successful procedures to teach object discriminations to children with learning disabilities: the experience of three years of research. Poster session presented at the 25th Annual Conference of the Association for Behavior Analysis. Chicago.

Williams, G. (1999, May). Data about possible variables affecting outcome in the treatment of children with autism. Paper presented at the 25th Annual Conference of the Association for Behavior Analysis. Chicago.

Pérez-González, L. A., & Williams, G. (1998, October). A multicomponent procedure to teach object discriminations to children with autism. Poster session presented at the New York State Association for Behavior Analysis, Saratoga Springs, NY.

Williams, G., Pérez-González, L. A., & Kwasnik, K. (1998, May). Object discrimination in children with autism: teaching the component processes. Paper presented at the 24th Annual Convention of the Association for Behavior Analysis, Orlando, FL.

Williams, G. & Pérez-González, L. A. (1998, May). The functional independence of tacting an object and selecting the object on command. Paper presented at the 24th Annual Convention of the Association for Behavior Analysis, Orlando, FL.

Williams, G. & Pérez-González, L. A. (1998, May). The apparent facility of matching an object to its own sound versus matching the object to its spoken name. Poster session presented at the 24th Annual Convention of the Association for Behavior Analysis, Orlando, FL.

Williams, G. & Pérez-González, L. A. (1998, April). The Independence and dependence of Tacting and selecting the object on command. Paper presented at the Annual Conference of the Experimental Analysis of Behavior Group. London, United Kingdom.

Williams, G, & Williams-Keller, J. (1997, September). Teaching Language to the Nonverbal Child: A Verbal Behavior Analysis. Paper presented at the New York State Association for Behavior Analysis, Tarrytown, NY.

Williams, G. (1997, May). Teaching Discrimination Skills to Learners with Developmental Disabilities: Recent Research Findings. Poster session presented at the 23rd Annual Convention of the Association for Behavior Analysis, Chicago.

Pérez-González, L. A.. & Williams, G. (1997, July). Novel Procedures to Teach a Conditional Discrimination to a child with severe developmental delays. Paper presented at the III European Meeting for the Experimental Analysis of Behavior. Dublin, Ireland.