the project for an international audience. Until now only scattered publications have existed. This book is more than just a compilation of previously published results. Rather, it is the original contributions and a substantial share of newly published empirical results that guarantee an up-to-date exposition of the entire program. The general goal of the research group is to perform basic research in attaining explanations for the relationships between attitude and behavior and to improve the predictability of current predictor models. In pursuing this goal we are not primarily interested in the immediate strategy of redefining predictor variables within the framework of the general linear statistical model. Rather, we emphasize cognitive processes and structures that predispose a person's behavior, that accompany behavior, or that change as a result of prior behavior.