They do this by adding new information to the belief or by changing the importance of the belief or parts of the belief. "Festinger, Leon I never had a course at Iowa in social psychology either. What drew Festinger to Iowa were Lewins ideas, developed with his Berlin group, on tension systems and the remembering and completion of interrupted tasks, force fields and Umweg situations (Festinger, 1980, p. 237). Alex Festinger worked as an embroidery manufacturer. In this publication, Festinger used a set of formal propositions to explain the antecedent conditions and the consequences of comparing ones own attitudes and abilities to those of others. An Experimental Test of a Theory of Decision. PhD diss., State University of Iowa, 1942. Brehm, J., & Festinger, L. (1957). Margolis, S. T. Cognitive Dissonance: A Bibliography of Its First Decade. Psychological Reports 24 (1969): 923935. To study 'Seekers' through participant observation. Some of Festingers papers are archived in the Bentley Historical Library at the University of Michigan, Ann Arbor. document.write('Pete Alonso Wedding Pictures, Articles F