Over 75 years ago, Gordon Allport stated that the attitude construct is the heart of social psychology. Allport's sentiment remains true today - people's evaluations of themselves, other individuals, groups and social issues are the core of the discipline. This four-volume set brings together important papers on the psychology of attitudes to serve as the most fully comprehensive collection on the attitude concept. Volume I: Attitude Content, Structure, Function and Measurement Volume II: Implications for Information Processing and Behavior Volume III: Cognitive, Affective and Behavioral Processes That Shape Attitudes Volume IV: Roles of Brain, Body and Society