This study investigates the effectiveness of an instruction-simulation videotape in training counselor candidates to use counselor-tacting response leads (CTRL's). Such verbal responses are viewed as essential to behavior modification therapy since they operationally define specific behavioral events and the stimulus conditions associated with these events. Three propositions were tested and accepted: (1) that immediate learning takes place; (2) that this learning was generalized to actual counseling by the counselor candidates; and (3) that the use of CTRL's did not inhibit or hinder other counselor behaviors which were examined. (TL)