Alle Publikationen
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2017
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(2017): Locally noisy autonomous agents improve global human coordination in network experiments. In: Nature 545 (7654), S. 370-374. DOI: 10.1038/nature22332
DOI: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5912653 Abstract: Coordination in groups faces a sub-optimization problem and theory suggests that some randomness may help to achieve global optima. Here we performed experiments involving a networked colour coordination game in which groups of humans interacted with autonomous software agents (known as bots). Subjects (n = 4,000) were embedded in networks (n = 230) of 20 nodes, to which we sometimes added 3 bots. The bots were programmed with varying levels of behavioural randomness and different geodesic locations. We show that bots acting with small levels of random noise and placed in central locations meaningfully improve the collective performance of human groups, accelerating the median solution time by 55.6%. This is especially the case when the coordination problem is hard. Behavioural randomness worked not only by making the task of humans to whom the bots were connected easier, but also by affecting the gameplay of the humans among themselves and hence creating further cascades of benefit in global coordination in these heterogeneous systems.
2016
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(2016): Intuition and Moral Decision-Making - The Effect of Time Pressure and Cognitive Load on Moral Judgment and Altruistic Behavior. In: PLoS one 11 (10). DOI: 10.1371/journal.pone.0164012
DOI: https://doi.org/10.1371/journal.pone.0164012 Abstract: Do individuals intuitively favor certain moral actions over others? This study explores the role of intuitive thinking-induced by time pressure and cognitive load-in moral judgment and behavior. We conduct experiments in three different countries (Sweden, Austria, and the United States) involving over 1,400 subjects. All subjects responded to four trolley type dilemmas and four dictator games involving different charitable causes. Decisions were made under time pressure/time delay or while experiencing cognitive load or control. Overall we find converging evidence that intuitive states do not influence moral decisions. Neither time-pressure nor cognitive load had any effect on moral judgments or altruistic behavior. Thus we find no supporting evidence for the claim that intuitive moral judgments and dictator game giving differ from more reflectively taken decisions. Across all samples and decision tasks men were more likely to make utilitarian moral judgments and act selfishly compared to women, providing further evidence that there are robust gender differences in moral decision-making. However, there were no significant interactions between gender and the treatment manipulations of intuitive versus reflective decision-making. zitiert von 19
2010
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(2010): Creating good relationships: Responsiveness, relationship quality, and interpersonal goals. In: Journal of personality and social psychology 99 (1), S. 78-106. DOI: 10.1037/a0018186
DOI: http://www.ncbi.nlm.nih.gov/pubmed/20565187 Abstract: Perceived partner responsiveness is a core feature of close, satisfying relationships. But how does responsiveness originate? Can people create relationships characterized by high responsiveness and, consequently, higher quality relationships? The authors suggest that goals contribute to cycles of responsiveness between two people, improving relationship quality for both of them. The present studies examine (a) how interpersonal goals initiate responsiveness processes in close relationships, (b) the self-perpetuating nature of these processes, and (c) how responsiveness evolves dynamically over time through both intrapersonal projection and reciprocal interpersonal relationship processes. In a semester-long study of 115 roommate dyads, actors' compassionate and self-image goals predicted a cycle of responsiveness between roommates, occurring within weeks and across the semester. In a 3-week study of 65 roommate dyads, actors' goals again predicted cycles of responsiveness between roommates, which then contributed to both actors' and partners' relationship quality. Results suggest that both projection and reciprocation of responsiveness associated with compassionate goals create upward spirals of responsiveness that ultimately enhance relationship quality for both people.
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(2010): You smile--I smile. Emotion expression in social interaction. In: Biological psychology 84 (3), S. 514-520. DOI: 10.1016/j.biopsycho.2009.11.001
DOI: http://www.ncbi.nlm.nih.gov/pubmed/19913071 Abstract: Two studies were conducted to assess the influence of emotional context and social context, in terms of gender and status, on speaker expressivity and observer mimicry in a dyadic interactive setting. For Study 1, 96 same sex dyads and for Study 2, 72 mixed sex dyads participated in a social sharing paradigm. The results showed that in both same sex and mixed sex dyads women smile more than men and members of both sexes use Duchenne smiles rather than non-Duchenne smiles to signal social intent. In same sex dyads facial expressivity and facial mimicry were determined by both the emotional and the social context of the situation. However, whereas emotional context effects maintained, social context effects were absent in mixed sex dyads. The study is the first to show evidence for facial mimicry in an interactional setting and supports the notion that mimicry is dependent on social context.
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