The Nature of Theory and Research in Social Psychology aims to provide advanced undergraduate and graduate students with a solid foundation in the logic of theory construction and the experimental method; and to teach students how to read, critically evaluate, and appreciate professional literature in the behavioral sciences. The book is believed to be unique in this latter respect and that it will serve a vital need in several different courses. The book is organized into two parts. Part I contains a detailed exposition of the nature of theory and research. It discusses the nature of formal theory, derivation of hypotheses, and the testing of hypotheses. It explicates in great detail the experimental approach to hypothesis testing. Both formal and informal aspects of a psychological experiment are discussed. Part II includes five chapters that enable students to put their analytical skills to use. Five substantive areas from social psychology have been selected. Each chapter includes three reprinted journal articles, and the chapter may be considered a ""case study"" in the analysis of experimental research in a given problem area. The following topics are covered in this section: dissonance and disconfirmed expectancies; dissonance and severity of initiation, primary-recency in personality impression formation, forewarning and anticipatory attitude change, and dependency and helping.