The structure of personality capabilities.

Wallace (1966) proposed that personality be construed as a set of abilities. Rather than assessing typical performance, as in trait ratings, he recommended assessing an individuals ability to perform social behaviors. We have elaborated this notion by distinguishing between personality abilities and capabilities. In this article we focus on the capability, that is, the ease with which an individual can display a certain category of social responses. A capability X is assessed with self-reports of (a) likelihood of performing X when perceived to be required, (b) perceived difficulty in performing X, (c) anxiety in performing X, and (d) tendency to avoid performing X. In Study 1 we examined the relations among six measures of 16 interpersonal behaviors in the context of the interpersonal circumplex. The four capability-related measures were shown to be measuring something distinct from the two trait measures. Unlike trait measures, which showed a circular structure in two dimen-sions, capability measures exhibited a positive manifold structure (i.e., no negative intercorre-lations). The first two orthogonal factors were interpreted as Hostility and Nurturance, which are normally bipolar opposites on trait measures. Thus individuals capable of hostility are also capable of nurturance. The only dimension to remain bipolar was introversion-extraversion. In Study 2, the nomological network of the capability measures was shown to be consistent with the theoretical