In the 25 years since the publication of the article reprinted in this issue of "Behavioral Disorders", a tremendous amount of research and opinion has been published on the topics of functional analysis, functional assessment, and assessment-based interventions. In this commentary, we reflect on the context in which our original work…

This article discusses the contributions of applied behavior analysis (ABA) in effective instruction of students with autism spectrum disorders. Emphasis is on the use of antecedent interventions and curriculum-based assessment. It also notes that the principles and methods of ABA are being integrated into routine educational procedures, including…