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Nominal kinship cues facilitate altruism
1Department of Psychology, McMaster University, Hamilton, Ontario, Canada L8S 4K1.
Proceedings. Biological Sciences
|January 19, 2002
Summary
Shared names, particularly uncommon surnames, significantly increase altruistic behavior by acting as kinship cues. Women showed higher altruism than men, especially when names indicated relatedness.
Area of Science:
- Evolutionary Psychology
- Social Psychology
- Behavioral Economics
Background:
- Altruistic behavior is crucial for social cohesion.
- Kin selection theory suggests individuals favor relatives.
- The role of names as kinship cues in promoting altruism requires further investigation.
Purpose of the Study:
- To determine if shared names (first and last) promote altruistic behavior.
- To examine if the commonality of names influences their effectiveness as kinship cues.
- To investigate gender differences in name-based altruism.
Main Methods:
- A large-scale email experiment (N=2960) was conducted.
- Participants received help requests from same-sex senders sharing varying degrees of their names (full, first only, last only, or neither).
- Response rates to the help requests were recorded as a measure of altruism.
Main Results:
- Helpful responses were highest when senders shared both first and last names (12.3%) and lowest when they shared neither (2.0%).
- The effect was more pronounced for relatively uncommon names.
- Women were significantly more likely to respond altruistically than men.
Conclusions:
- Names serve as salient cues of kinship, effectively eliciting altruistic behavior.
- Shared surnames are potent kinship cues, especially when uncommon.
- Findings support the role of names in activating kin recognition mechanisms and promoting prosocial behavior.