Gabriela Blum

Integrating Personality Structure, Personality Process, and Personality Development

In this target article, we argue that personality processes, personality structure, and personality development have to be understood and investigated in integrated ways in order to provide comprehensive responses to the key questions of personality psychology. The psychological processes and mechanisms that explain concrete behaviour in concrete situations should provide explanation for patterns of variation across situations and individuals, for development over time as well as for structures observed in intra–individual and inter–individual differences. Personality structures, defined as patterns of covariation in behaviour, including thoughts and feelings, are results of those processes in transaction with situational affordances and regularities. It cannot be presupposed that processes are organized in ways that directly correspond to the observed structure. Rather, it is an empirical question whether shared sets of processes are uniquely involved in shaping correlated behaviours, but not uncorrelated behaviours (what we term ‘correspondence’ throughout this paper), or whether more complex interactions of processes give rise to population–level patterns of covariation (termed ‘emergence’). The paper is organized in three parts, with part I providing the main arguments, part II reviewing some of the past approaches at (partial) integration, and part III outlining conclusions of how future personality psychology should progress towards complete integration. Working definitions for the central terms are provided in the appendix. Copyright

Proposal of a Nonlinear Interaction of Person and Situation (NIPS) model

Marshall and Brown (2006) proposed a Traits as Situational Sensitivities (TASS) Model, which implies a systematic person × situation interaction. We review this model and show that it suffers from several limitations. We extend and modify the model in order to obtain a symmetric pattern of levels and effects for both person and situation factors. Our suggestions result in a general Nonlinear Interaction of Person and Situation (NIPS) Model. The NIPS model bears striking similarities to the Rasch model. Based on the symmetric nature of the NIPS model, we generalize the concept of weak and strong situations to individuals and propose the concepts of weak and strong persons. Finally, we discuss psychological mechanisms that might explain the NIPS pattern and offer ideas for future research.

The Nonlinear Interaction of Person and Situation (NIPS) Model: Theory and Empirical Evidence: Nonlinear interaction of person and situation

Despite the broad consensus in psychology that human behaviour is influenced by the interaction between characteristics of the person and characteristics of the situation, not much is known about the precise shape of this person–situation (P × S) interaction. To address this issue, we introduce and test the nonlinear interaction of person and situation (NIPS) model. The NIPS model can be applied to explain contradictory research results, offers a more accurate prediction of behaviour, and can be applied to any trait. In three studies and with three different analytical approaches, we test the NIPS model and its implications. In the pre–study, we test whether variability in participants’ behaviour is smaller in extreme aggression–provoking and jealousy–inducing situations than in moderate situations, suggesting the effect of ‘strong’ situations at the extremes of the situation continuum. In Studies 1 and 2, we test the nonlinear relation between person and situation variables in predicting behaviour in within–subject designs and provide support for the predictions of the NIPS model. Future lines of research with the NIPS model are discussed. Copyright

Authors' Response. Working towards integration of personality structure, process, and development

We applaud Baumert and colleagues’ ambitious idea to integrate personality processes, structure, and development into a single general theory with the aim of fully explaining people’s behavior across situations. However, we argue that building a general theory of human behavior, similarly to a Theory of Everything, may not only be less feasible, but also less meaningful, than it appears at first sight. Copyright

Laughing About Hitler

Effects of the movie My Fuehrer – The Truly Truest Truth About Adolf Hitler by Dani Levy were tested with regard to: (a) attitudes toward Hitler, (b) the perceived role of the German population in Nazi Germany, (c) the perception of present danger from national socialist tendencies, and (d) the subjective need for continued preoccupation with German history. A total of 110 Germans were invited to a cinema and randomly assigned to the control group that filled in the relevant questionnaire before the movie, or to the film group that filled in the questionnaire after the movie. The film group reported fewer negative attitudes toward Hitler than the control group and saw the German population less as victims. Attitudes toward right-wing political parties and empathy, as well as demographic variables, exerted significant moderator effects. Results are discussed with regard to the public controversy concerning a potential trivialization of Hitler and National Socialism by the movie.