Doug Greer is Professor of Education and Psychology and Coordinator of the Programs in Behavior Analysis at Columbia University, Teachers College and the Graduate School of Arts and Sciences, where he has taught for 37 years.  He is the author of over 120 research reports (27 on verbal behavior analysis) and conceptual publications in 25 different journals, as well as 12 books, and he has sponsored 130 doctoral dissertations.  Greer is a Fellow of the Association for Behavior Analysis and is the recipient of: (a) the American Psychology Association’s Fed S. Keller Award for Distinguished Contributions to Education, (b) The Association for Behavior Analysis award for Distinguished Contributions to the International Dissemination of Behavior Analysis, the designation of May 5 as the R. Douglas Greer day for Westchester County by the Westchester Legislature, and Distinguished Contributions to the Fred S. Keller School by The Fred S. Keller School.  He is a CABAS® Board certified as a Senior Behavior Analyst and a Senior Research Scientist and has assisted in the development of CABAS® School in the USA, Ireland, England, and Italy.  His research interests have included verbal behavior analysis, the development of verbal behavior, a learner-driven science of teaching and the organizational behavior analytic procedures to support that system, pediatric behavioral medicine, a behavioral psychology of music, and the induction of and applications of observational learning.  He has served on the editorial boards of Journal of Applied Behavior Analysis, Journal of Behavioral Education, In Segnare all' Handicappato, Journal of Early and Intensive Behavioral Interventions (Associate Editor), European Journal of Behavior Analysis, The American Psychologist, Verplanck’s Glossary and Thesaurus of The Science of Behavior, The Behavior Analyst, American Journal of Mental Deficiency, Bulletin of the Council for Research in Music Education, and the Journal of Music Therapy.  Greer has served as distinguished visiting professor at five universities in Spain (Cadiz, Almeria, Oviedo, Grenada, and Salamanca), a higher education programs in applied behavior analysis in Norway, and has lectured at the University of Wales at Bangor.  He has presented keynote addresses at conferences on behavior analysis in Canada, Israel, Nigeria, Japan, Spain, Ireland, England, Brazil, Norway, Italy, Taiwan, and Korea.  Denise E. Ross is an associate professor of psychology and education in the Programs for Applied Behavior Analysis at Teachers College, Columbia University.  She completed her PhD at Columbia University in 1998 and taught at Florida Atlantic University before joining Teachers College in 2002.  Her research on verbal behavior and children with autism and other developmental disabilities has been published in Education and Training in Developmental Disabilities, Research in Developmental Disabilities, the Journal of Behavioral Education, The Behavior Analyst Today, Journal of Early and Intensive Behavioral Interventions, and the Analysis of Verbal Behavior.