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Previous research suggests that one\u2019s self-concept is not only construed from individual characteristics but also from one\u2019s social experiences and group memberships. Thus, important life experiences such as childbirth and becoming a parent have significant impacts on one\u2019s self-concept and subsequently influence the categorisation of information regarding the self and others. In two experiments, women who gave birth within the last 2\u2009years were recruited and tested on a series of categorisation tasks using names (Experiment 1) or faces (Experiment 2) as stimuli. Results consistently revealed faster reaction times in response to the self regardless of stimulus type (name or face) and response category (self vs. other, family vs. non-family, familiar vs. non-familiar). A family bias for one\u2019s own baby name and one\u2019s own mother name over friend was observed in the family versus non-family but not in the familiar versus non-familiar categorisation tasks. These findings indicate that information regarding the self and one\u2019s family members receives preferential processing in social categorisation. These findings contribute to current understandings of the evolving self-concept through social experiences and its influence on group membership categorisations and response behaviour.<\/jats:p>","DOI":"10.1177\/17470218251332905","type":"journal-article","created":{"date-parts":[[2025,4,2]],"date-time":"2025-04-02T07:32:53Z","timestamp":1743579173000},"page":"2816-2828","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":2,"title":["The social self: Categorisation of family members examined through the self-bias effect in new mothers"],"prefix":"10.1177","volume":"78","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5862-5711","authenticated-orcid":false,"given":"Mengyin","family":"Jiang","sequence":"first","affiliation":[{"name":"Department of Social and Behavioural Sciences, City University of Hong Kong, Hong Kong, Hong Kong SAR"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Sui","sequence":"additional","affiliation":[{"name":"School of Psychology, University of Aberdeen, Aberdeen, UK"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2025,4,27]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.evolhumbehav.2007.04.004"},{"key":"e_1_3_2_3_1","doi-asserted-by":"publisher","DOI":"10.1037\/0012-1649.17.5.650"},{"key":"e_1_3_2_4_1","first-page":"411","article-title":"Infantile head shape as an elicitor of adult protection","volume":"29","author":"Alley T. 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