Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding
Humans have engaged in unique cooperative breeding insofar as multiple in-group members help mothers. Two psychological-proximate factors maintain such a breeding system—various individuals' interest in infants and mothers' positive reactions toward individuals approaching their infants—wh...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SAGE Publishing
2015-04-01
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| Series: | Evolutionary Psychology |
| Online Access: | https://doi.org/10.1177/147470491501300210 |
| _version_ | 1797255588885823488 |
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| author | Kumiko Nishiyama Kouji Oishi Atsuko Saito |
| author_facet | Kumiko Nishiyama Kouji Oishi Atsuko Saito |
| author_sort | Kumiko Nishiyama |
| collection | DOAJ |
| description | Humans have engaged in unique cooperative breeding insofar as multiple in-group members help mothers. Two psychological-proximate factors maintain such a breeding system—various individuals' interest in infants and mothers' positive reactions toward individuals approaching their infants—which we investigated in the present study. In Study 1, we conducted field observations to examine the first factor: what types of passersby in Japan reacted to the mother and infant. This replicated studies conducted in Western countries more than 30 years ago, allowing for the examination of the influence of culture and time. The results confirmed the differences among age groups in frequency of looking at mother and infant, and predicted its universality, especially the rise in older adults. The sex difference was not significant. In Study 2, we gathered data via questionnaires and interviews using hypothetical scenarios to investigate the second factor: how mothers felt when their infants were approached by strangers. The results revealed that mothers received strangers' approaches positively. The present study showed that humans engaged in unique cooperative breeding in the Environment of Evolutionary Adaptedness (EEA), where mothers in modern society see strangers as potential helpers as part of the EEA. |
| first_indexed | 2024-04-24T22:08:15Z |
| format | Article |
| id | doaj.art-91f61614854a4559a9fedc4d08c4ae80 |
| institution | Directory Open Access Journal |
| issn | 1474-7049 |
| language | English |
| last_indexed | 2024-04-24T22:08:15Z |
| publishDate | 2015-04-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Evolutionary Psychology |
| spelling | doaj.art-91f61614854a4559a9fedc4d08c4ae802024-03-20T11:03:36ZengSAGE PublishingEvolutionary Psychology1474-70492015-04-011310.1177/14747049150130021010.1177_147470491501300210Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative BreedingKumiko NishiyamaKouji OishiAtsuko SaitoHumans have engaged in unique cooperative breeding insofar as multiple in-group members help mothers. Two psychological-proximate factors maintain such a breeding system—various individuals' interest in infants and mothers' positive reactions toward individuals approaching their infants—which we investigated in the present study. In Study 1, we conducted field observations to examine the first factor: what types of passersby in Japan reacted to the mother and infant. This replicated studies conducted in Western countries more than 30 years ago, allowing for the examination of the influence of culture and time. The results confirmed the differences among age groups in frequency of looking at mother and infant, and predicted its universality, especially the rise in older adults. The sex difference was not significant. In Study 2, we gathered data via questionnaires and interviews using hypothetical scenarios to investigate the second factor: how mothers felt when their infants were approached by strangers. The results revealed that mothers received strangers' approaches positively. The present study showed that humans engaged in unique cooperative breeding in the Environment of Evolutionary Adaptedness (EEA), where mothers in modern society see strangers as potential helpers as part of the EEA.https://doi.org/10.1177/147470491501300210 |
| spellingShingle | Kumiko Nishiyama Kouji Oishi Atsuko Saito Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding Evolutionary Psychology |
| title | Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding |
| title_full | Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding |
| title_fullStr | Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding |
| title_full_unstemmed | Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding |
| title_short | Passersby Attracted by Infants and Mothers' Acceptance of Their Approaches: A Proximate Factor for Human Cooperative Breeding |
| title_sort | passersby attracted by infants and mothers acceptance of their approaches a proximate factor for human cooperative breeding |
| url | https://doi.org/10.1177/147470491501300210 |
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