First published in 1996. The field of behavior analysis began with the research studies of B.F. Skinner in the 1930s. In 1950, Keller and Schoenfeld published Principles of Psychology. It was the first text to present the basic principles of behavior analysis in a systematic fashion. While continuing to cite and describe the seminal articles in the field, in this book Leslie also includes clear presentations of new findings. The systematic presentation...