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Influence of facial dimorphism on interpersonal trust: weighing warmth and competence traits in different trust situations

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Abstract

When interacting with strangers, people tend to draw inferences pertaining to the strangers’ personality traits based on their facial information, which leads to differential feelings of trust for the strangers. This study explored whether the weightage which individuals’ provide to facial warmth and competence changes with social situations when they have to make decisions based on trust. In experiment 1, a donation context was set, and the participants tended to select a stranger volunteer with feminine face as the recipient of a higher donation amount. In experiment 2, an investment context was set, and while interacting with male trustees, the participants tended to select masculine male faces as recipients of a higher investment amount. However, a contradictory result was obtained when the participants interacted with the female trustees. Participants’ perceptions of the trustworthiness of the four kinds of faces (feminine or masculine male faces, feminine or masculine female faces) predicted the corresponding donation and investment amounts. The results indicated that feminine faces (both male and female) were preferred as recipients of donation, and the warmth in the faces was given more weightage in the donation context (warmth perception). In the investment context (competence perception), participants tended to choose masculine faces as recipients of investment amount among the male faces but showed a preference for feminine faces among female faces. The research provides empirical support for a better understanding of the mechanisms behind highly flexible and complex social interactions among humans.

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Data availability

All data generated or analysed in this study are available from the corresponding author on reasonable request.

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Funding

The research was supported by the National Social Science Foundation of China (Grant No. 19BSH117). The funding agencies did not have input into the content of the manuscript and the views described in the manuscript reflect those of the authors and not necessarily those of the funding agencies.

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Contributions

XHL: Data curation, Formal analysis, Investigation, Software, Visualization, Writing-original draft. JS: Data curation, Formal analysis, Investigation, Visualization. JG: Validation, Writing-review & editing. XJW: Validation, Writing-original draft, Writing-review & editing. LJC: Conceptualization, Funding acquisition, Methodology, Project administration, Resources, Supervision.

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Correspondence to Lijun Chen.

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Ethics approval

The study was exclusively carried out by the behavioral experiments among human adults. And the experiments have been conducted in a manner consistent with the American Psychological Association's Ethical Principles in the Conduct of Research with Human Participants (2010).

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Informed consent was obtained from all individual participants included in the study.

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The authors have no relevant financial or non-financial interests to disclose.

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Luo, X., Song, J., Guan, J. et al. Influence of facial dimorphism on interpersonal trust: weighing warmth and competence traits in different trust situations. Curr Psychol 43, 2158–2172 (2024). https://doi.org/10.1007/s12144-023-04472-w

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  • DOI: https://doi.org/10.1007/s12144-023-04472-w

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