ArticleDevelopmental psychology2026
Patterns and correlates of changes in sibling intimacy and conflict from middle childhood through young adulthood.
Article in Developmental psychology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 7 citations in OpenAlex.
- Older Siblings' Responses to Younger Siblings' Peer Conflict: A Qualitative Study With Black Children and Adolescents in High-Violence Communities.Journal of interpersonal violence · 2026Article
- Trajectories and correlates of Latino/a children's sibling relationships.Developmental psychology · 2026Article
- Time-varying associations among maternal and paternal warmth, sibling intimacy, and youth familism values among U.S. Mexican-origin youth.Cultural diversity & ethnic minority psychology · 2026Article
- Effects of the Incredible Years parenting program on sibling conduct problems: A latent transition analysis.JCPP advances · 2025Article
- Social buffering by siblings in childhood and adolescence.Psychoneuroendocrinology · 2025Article
- Sibling relational aggression: Developmental change and associations with family relationships across adolescence.Journal of family psychology : JFP : journal of the Division of Family Psychology of the American Psychological Association (Division 43) · 2024Article
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Authors and funding
4 authors at 3 institutions in 1 country.
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Abstract
Sibling relationships are most individuals' longest lasting relationships, but their development remains understudied. Using a within-family, accelerated longitudinal design with data from mothers, fathers, and two siblings from 201 predominately White, working-, and middle-class families, we charted the development of sibling intimacy and conflict from age 7 to age 30. We also examined structural characteristics (sibling sex, sex constellation, age spacing, birth order) and both person mean (between-person) and time-varying (within-person) links between (a) feminine-typed, expressive personality and (b) maternal and paternal warmth and conflict and sibling intimacy and conflict, respectively, and tested whether sibling age moderated these linkages. Overall cubic changes suggested that intimacy declined from middle childhood through early adolescence and increased through the mid-20s and leveled off, whereas conflict was stable in middle childhood, declined across adolescence, and leveled off in young adulthood, with patterns that varied by sibling sex, dyad sex constellation, and birth order. Furthermore, expressivity was related to both sibling intimacy (positively) and conflict (negatively) at between- and within-person levels; maternal warmth was positively related to sibling intimacy and maternal conflict was positively related to sibling conflict at both between- and within-person levels; and father warmth and conflict were linked to sibling intimacy and conflict, respectively, at the within-person level. Finally, age moderated expressivity effects such that these disappeared in young adulthood and moderated the between-person father warmth effect such that this effect emerged in young adulthood and increased through age 30. Implications for theory and practice regarding sibling and other close relationships are discussed. (PsycInfo Database Record (c) 2026 APA, all rights reserved).
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.