“…closure conditions, in which the therapist is While the present study did not examine portrayed as cold and enigmatic. Increased directly the "dyadic effect" of self-disclosure control over the independent variable was ac-(see Jourard, 1971), in which subjects' self-complished in this study (see Measures secdisclosures are viewed as a dependent varia-tion) by systematically varying the level of ble, it may be inferred that, since clients' im-therapist self-disclosure, pressions are partly responsible for increased Experimenter bias (see Rosenthal, 1966), self-disclosure, this effect would be attenuated, another recognized contaminant to self-dis-Further, in this connection, in many of the closure research (cf., Jourard & Jaffe, 1970), studies which seem to corroborate a "dyadic particularly evident in studies employing aceffect" of self-disclosure (e.g., Davis & Skin-tors and video equipment to manipulate theraner, 1974;Gary & Hammond, 1970;Jourard pist self-disclosure (e.g., Nilsson et al, 1979), & Resnick, 1970Worthy et al, 1969) it is has been minimized in this study by utilizing difficult, if not impossible, to determine written dialogues as the treatment conditions, whether the effect of self-disclosure per se, or Selection factors, yet another contributor some other aspect of the interpersonal com-to potential invalidity, have been known to munication (e.g., attitude similarity), is re-interact with the experimental treatment and sponsible for the effects obtained.…”