@article{WeissPaeleckeHewig2021,
  author    = {Weiß, Martin and Paelecke, Marko and Hewig, Johannes},
  title     = {In Your Face(t) — Personality Traits Interact With Prototypical Personality Faces in Economic Decision Making},
  series = {Frontiers in Psychology},
  volume    = {12},
  journal   = {Frontiers in Psychology},
  issn      = {1664-1078},
  doi       = {10.3389/fpsyg.2021.652506},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-237051},
  year      = {2021},
  abstract  = {In everyday life, assumptions about our peers' as well as our own personality shape social interactions. We investigated whether self-rated personality and inferences drawn from partners' faces influence economic decisions. Participants (N = 285) played the trust game in the role of the trustor as well as the ultimatum game in the role of the proposer and interacted with trustees and receivers represented by prototypical personality faces. Participants also evaluated both their own traits and the personality of the faces. In the trust game, trustees represented by faces rated higher on agreeableness yielded higher transferred amounts. This effect was more pronounced for trustors low on dispositional trust, whereas trustors high on dispositional trust did not relate their decisions to the faces. Trustees represented by faces rated higher on conscientiousness yielded higher transferred amounts only for trustors high on dispositional anxiety. In the ultimatum game, receivers represented by faces rated higher on conscientiousness yielded lower offers only for proposers high on dispositional assertiveness. These results extend previous findings on the inferences drawn from facial features and the influence of personality on decision making. They highlight the importance of considering the personality of both interaction partner, as well as potential interactions of players' traits.},
  language  = {en}
}
@article{RieplMusselOsinskyetal.2016,
  author    = {Riepl, Korbinian and Mussel, Patrick and Osinsky, Roman and Hewig, Johannes},
  title     = {Influences of State and Trait Affect on Behavior, Feedback-Related Negativity, and P3b in the Ultimatum Game},
  series = {PLoS One},
  volume    = {7},
  journal   = {PLoS One},
  number    = {11},
  doi       = {10.1371/journal.pone.0146358},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-147386},
  pages     = {e0146358},
  year      = {2016},
  abstract  = {The present study investigates how different emotions can alter social bargaining behavior. An important paradigm to study social bargaining is the Ultimatum Game. There, a proposer gets a pot of money and has to offer part of it to a responder. If the responder accepts, both players get the money as proposed by the proposer. If he rejects, none of the players gets anything. Rational choice models would predict that responders accept all offers above 0. However, evidence shows that responders typically reject a large proportion of all unfair offers. We analyzed participants' behavior when they played the Ultimatum Game as responders and simultaneously collected electroencephalogram data in order to quantify the feedback-related negativity and P3b components. We induced state affect (momentarily emotions unrelated to the task) via short movie clips and measured trait affect (longer-lasting emotional dispositions) via questionnaires. State happiness led to increased acceptance rates of very unfair offers. Regarding neurophysiology, we found that unfair offers elicited larger feedback-related negativity amplitudes than fair offers. Additionally, an interaction of state and trait affect occurred: high trait negative affect (subsuming a variety of aversive mood states) led to increased feedback-related negativity amplitudes when participants were in an angry mood, but not if they currently experienced fear or happiness. We discuss that increased rumination might be responsible for this result, which might not occur, however, when people experience happiness or fear. Apart from that, we found that fair offers elicited larger P3b components than unfair offers, which might reflect increased pleasure in response to fair offers. Moreover, high trait negative affect was associated with decreased P3b amplitudes, potentially reflecting decreased motivation to engage in activities. We discuss implications of our results in the light of theories and research on depression and anxiety.},
  language  = {en}
}
@article{MusselGoeritzHewig2013,
  author    = {Mussel, Patrick and G{\"o}ritz, Anja S. and Hewig, Johannes},
  title     = {The value of a smile: Facial expression affects ultimatum-game responses},
  series = {Judgment and Decision Making},
  volume    = {8},
  journal   = {Judgment and Decision Making},
  number    = {3},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-129639},
  pages     = {381-385},
  year      = {2013},
  abstract  = {In social interaction, the facial expression of an opponent contains information that may influence the interaction. We asked whether facial expression affects decision-making in the ultimatum game. In this two-person game, the proposer divides a sum of money into two parts, one for each player, and then the responder decides whether to accept the offer or reject it. Rejection means that neither player gets any money. Results of a large-sample study support our hypothesis that offers from proposers with a smiling facial expression are more often accepted, compared to a neutral facial expression. Moreover, we found lower acceptance rates for offers from proposers with an angry facial expression.},
  language  = {en}
}