Thomas Keßler

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A widely researched panacea for reducing intergroup prejudice is the contact hypothesis. However, few longitudinal studies can shed light on the direction of causal processes: from contact to prejudice reduction (contact effects) or from prejudice to contact reduction (prejudice effects). The authors conducted a longitudinal field survey in Germany,(More)
Our identity consists of knowledge about our individual attributes (personal identity) as well as knowledge about our shared attributes derived from our membership in certain social groups (social identity). As individuals seek to achieve a positive self-image, they aim at comparing favorably with other individuals or their in-group comparing favorably with(More)
The present research compared the in-group-focused emotions of pride, guilt, and anger as predictors of three environmental intentions. In two scenario studies we manipulated the in-group’s responsibility for environmental damage or protection. In-group responsibility for environmental damage increased participants’ guilt and anger, whereas in-group(More)
Migration causes permanent processes of acculturation involving migrants but also members of mainstream society. A longitudinal field study with 70 German majority members investigated how their acculturation goals causally related to their attitudes and behaviours towards migrants. We distinguished acculturation goals concerning the migrants' culture(s)(More)
Frage: Eine Patientin forderte mich kürzlich per Schreiben auf, sämtliche Aufzeichnungen über Visiten, Krankheitsverlauf, Medikation, sowie alle Untersuchungsergebnisse zu vernichten. Grund ist ihrerseits die Angst vor Fehlinterpretationen durch andere Ärzte, die Befunde anfordern könnten, bzw. ein generelles „abgestempelt werden“ durch Andere. Muss bzw.(More)
We argue that general social psychological mechanisms (e.g., common group identity) can account for prosocial behavior and cooperative norms without the need for punishing Big Gods. Moreover, prosocial religions often do not prevent conflict within their religious groups. Hence, we doubt whether Big Gods and prosocial religions are more effective than(More)
The increasing prevalence of Parkinson syndrome and its cost-intensive modern therapies make for a growing economic burden. Studies on cost to date have limited validity owing to the various methods employed (retrospective, focus on partial expenses, minimal case numbers, etc.). The present study collected data pertaining to direct costs. Seventy-seven(More)
Instead of enhancing diversity in research groups, we suggest that in order to reduce biases in social psychological research a more basic formulation and systematic testing of theories is required. Following the important but often neglected ecological research approach would lead to systematic variation of stimuli and sometimes representative sampling of(More)
People remember uncooperative individuals better than cooperative ones. We hypothesize that this is particularly true when uncooperative individuals belong to one's ingroup, as their behavior violates positive expectations. Two studies examined the effect of minimal group categorization on reputational memory of the social behavior of particular ingroup and(More)
Frage: Eine Patientin forderte mich kürzlich per Schreiben auf, sämtliche Aufzeichnungen über Visiten, Krankheitsverlauf, Medikation, sowie alle Untersuchungsergebnisse zu vernichten. Grund ist ihrerseits die Angst vor Fehlinterpretationen durch andere Ärzte, die Befunde anfordern könnten, bzw. ein generelles „abgestempelt werden“ durch Andere. Muss bzw.(More)