By the late 1970s it was clear that cognitive and behavioral therapies were promising alternatives to antidepressant medications for treatment of depressed outpatients. One such model of therapy, Social Skills Training, was developed by Michel Hersen and his colleagues specifically for treatment of depressed women. Professor Hersen and his…

Positive behavior support (PBS) emerged in the mid-1980s as an approach for understanding and addressing problem behaviors. PBS was derived primarily from applied behavior analysis (ABA). Over time, however, PBS research and practice has incorporated evaluative methods, assessment and intervention procedures, and conceptual perspectives associated…

Sensitivity theory attempts to account for the variability often observed in challenging behavior by recourse to the "aberrant motivation" of people with intellectual and developmental disabilities. In this article, we suggest that a functional analysis based on environmental (challenging environments) and biological (challenging needs) motivating…