Objective determinants of perceived social support.

Objective characteristics of people's social networks were examined as determinants of the perceived availability of social support in two populations: elderly adults (n = 50) and mothers of 1-year-olds (n = 71). Number of network members and frequency of contact with network members, computed separately for kin and nonkin were examined as predictors of loneliness, overall social support, and the six components of social support proposed by Weiss (1974). Kin were found to be more effective providers than nonkin of some aspects of social support. Network characteristics were better predictors of perceived social support for the elderly than for the mothers, but a maximum of 30% of the variance in perceived social support was attributable to the objective network characteristics in either sample. It is recommended that future research on the determinants of perceived social support consider actual interpersonal behaviors, their contexts, and personality characteristics that affect the facilitation an interpretation of supportive behaviors.