“…It has been argued that in some cases a single major event may be a more important determinant (Brown, 1981), or that the absence of life events may be a stressor (Perkins, 1982). Others have argued that only undesirable events were important (e.g., Mueller, Edwards, & Yarvis, 1978;Vinokur & Seltzer, 1975), or that uncontrollable events were better predictors of illness (Stern, McCants, & Pettine, 1982).…”