Psychological well-being has been shown to be significantly influenced both by daily and major life events. The impact of two types of daily events on reports of physical and mental well-being was investigated in a multiple-time measurement design. Demand events which occur independently of one's volition, and desire events which arise from one's own choice were examined. Undergraduates (N=101) responded daily for 5 days to health and mood instruments and instruments assessing event occurrence, responses to events, and outcomes of those responses. The results indicated that desire satisfaction was related to taking action whereas demand satisfaction operated independently of demand responding. Demand event components were significant influences on the more negative aspects of well-being such as depression, anxiety, and somatization; quality of life judgments were similarly significantly related. Desire events had few significant relationships and did not relate to positive aspects of well-being. Subjects' responses appeared to be slanted toward the cognitive and behavioral aspects of well-being and were not strongly influenced on the affective/emotional side. The academic environment of subjects during the class weekdays may have generated a predominantly cognitive/behavioral orientation. (NRB)