Experimental tests to date:
Zettle, R. D., & Hayes, S. C. (1986). Dysfunctional control by client verbal behavior: The context of reason giving. The Analysis of Verbal Behavior, 4, 30-38.
Zettle, R. D., & Hayes, S. C. (1987). A component and process analysis of cognitive therapy. Psychological Reports, 61, 939-953.
Zettle, R. D., & Raines, J. C. (1989). Group cognitive and contextual therapies in treatment of depression. Journal of Clinical Psychology, 45, 438-445.
For further information contact: Robert Zettle (robert.zettle@wichita.edu), Wichita State University, Department of Psychology, 1845 N. Fairmount, Wichita, KS 67260-0034