An experimental investigation of the influence of self-disclosure on friendship was conducted by manipulating the level of self-disclosure. 65 same-sex pairs were randomly assigned to one of three treatment conditions, intimate self-disclosure, nonintimate self-disclosure and control (no disclosure); the treatment conditions were independently verified by judges' ratings. One member of each pair was randomly selected as the confederate or first speaker and was provided with a list of 7 conversation topics. There were no lists provided in the control condition. The dependent variable, level of friendship as measured by the Acquaintance Description Form (Wright, 1969), was rated before and after Ss engaged in self-disclosure, and the influence of the experimental conditions on friendship scores was assessed by analyses of covariance. The results showed that the general level of friendship increased as a function of intimate and nonintimate self-disclosure; however, intimate disclosure produced greater increases in friendship than nonintimate disclosure. The unique influence of self-disclosure on male friendship patterns is discussed.
