THE SCALE FOR INTERPERSONAL-BEHAVIOR AND THE WOLPE-LAZARUS ASSERTIVENESS SCALE - A CORRELATIONAL COMPARISON IN A NONCLINICAL SAMPLE

Despite an explosive proliferation of assertion measures, a hiatus has been observed by several authors to establish the psychometric adequacy of existing instruments. In order to expand the construct validity of the Scale for Interpersonal Behaviour (SIB) further, its (sub)scale components of distress and difficulty in assertiveness were correlated with the Wolpe-Lazarus Assertiveness Scale, the Social Anxiety Scale (a trait measure), and background factors such as sex, age and military rank in a large sample of healthy military personnel. From the findings it emerged that the measures exhibit a sizeable degree of shared variance (being only very minimally affected by item overlap across instruments), and that SIB scores are not affected by sex and age, though minimally so by military rank. © 1990.