Prosocial behavior during the COVID-19 pandemic in Germany. The role of responsibility and vulnerability.

In two pre-registered and fully incentivized studies ( = 501), we investigate prosocial behavior during the COVID-19 pandemic in Germany. Based on a comparison with pre-pandemic data, Study 1 shows that individuals' general prosociality measured with a (context-independent) Social Value Orientation Slider changed significantly before vs. during the early stage of the pandemic towards increased prosociality.

Altruistic Giving Toward Refugees: Identifying Factors That Increase Citizens' Willingness to Help.

Over the past decade, the world has faced an unprecedented refugee crisis. The large number of incoming refugees represents a challenge for host societies and its citizens triggering reactions from a supportive welcome to brusque rejection and hostile behavior toward refugees. In a pre-registered study, we investigated factors that could promote altruistic behavior in fully incentivized one-shot Dictator Game toward various receiver groups including refugees.

The development of ingroup favoritism in repeated social dilemmas.

In two comprehensive and fully incentivized studies, we investigate the development of ingroup favoritism as one of two aspects of parochial altruism in repeated social dilemmas. Specifically, we test whether ingroup favoritism is a fixed phenomenon that can be observed from the very beginning and remains stable over time, or whether it develops (increases vs. decreases) during repeated contact.