Advances in areas of behavior analysis are discussed to show the relev
ance of experimental science to behavior therapy. It is concluded that
there are many areas of mutual interest between experimental operant
psychologists and behavior therapists that may serve to enhance the cl
inical efficacy and range of behavior problems addressed by behavior t
herapists. Specific examination is given to areas of experimental beha
vior analysis such as reinforcement. including schedules of reinforcem
ent; the matching law: advanced issues in stimulus control; the intera
ction between operant and classical conditioning; behavioral momentum;
rule-governed behavior; and stimulus equivalence. The argument that b
ehavior therapists are not knowledgeable about behavior analysis is di
sputed, and it is concluded that behavior therapists are in a unique p
osition to be the practice professionals best able to utilize the prin
ciples of learning and behavior analysis in the service of adaptive be
havior change. (C) 1998 John Wiley Et Sons. Inc.