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David Starr Jordan Professor of Social Science in Psychology, personality. Ph.D. Psychology, University of Iowa, 1952. Analysis of basic mechanisms of personal agency through which people exercise control over their level of functioning and events that affect their lives. One line of reseach is concerned with how people regulate their own motivation, thought patterns, affective states and behavior through beliefs of personal and collective efficacy. These mechanisms are studied in the areas of sociocognitive development, affect regulation, health promotion and disease prevention, organizational functioning, and collective action for social change.