Traditional categorizations of diagnosis were absent in both wings of behavior therapy, as the concept was believed to be lacking in practical purpose, where in contrast, behavior therapists believed strongly in linking diagnosis with the individual application of scientifically well-established basic learning principles, leading to the selection of applied methods that were well- specified and empirically tested. 

Traditional diagnostic categories absent in behavior therapy

Placed strong emphasis on observable & quantifiable behaviors and their functions in altering the external environment, based on the theory that overt behavior, thoughts and feelings were all valid reflections of the same sets of overt contingencies. This approach still exists in classic applied behavior analysis. 

Syracuse University

An alternative model to the model of latent disease. Targeted psychological problems based on the idiographic application of behavioral principles to specific individuals’ personal cases. Opened the door to scientific analysis of thoughts and feelings, wherein all psychological actions were believed to accurately reflect a common history and argued to be scientifically significant, but there was a lack of attention given to addressing private experiences which were overshadowed by analysis of overt action. 

Era of behavior therapy

SG;, H. S. C. H. (n.d.). "third-wave" cognitive and behavioral therapies and the emergence of a process-based approach to intervention in psychiatry. World psychiatry : official journal of the World Psychiatric Association (WPA). Retrieved November 17, 2021, from https://pubmed.ncbi.nlm.nih.gov/34505370/?fc=None&amp;ff=20211014202414&amp;v=2.15.0. 

"Third-wave” cognitive and behavioral therapies and the emergence of a process-based approach to intervention in psychiatry

Behavior therapy wing: Direct contingency functional analytic approach

Addition to Skinnerian operant principles of neo-behavioral principles drawn from associative or social learning by behavior modifiers, which sought to better understand psychological issues. This approach argued that issues were mediated by internalization of social norms & models. 



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