Do MZ twins have discordant experiences of friendship? A qualitative hypothesis-generating MZ twin differences study

Kathryn Asbury, Nicola Moran and Robert Plomin

PLOS ONE, 2017, vol. 12, issue 7, 1-18

Abstract: Using a qualitative monozygotic (MZ) twin differences design we explored whether adolescent MZ twins report discordant peer relationships and, if so, whether they perceive them as causes, consequences or correlates of discordant behaviour. We gathered free-response questionnaire data from 497 families and conducted in-depth telephone interviews with 97 of them. Within this dataset n = 112 families (23% of the sample) described discordant peer relationships. Six categories of discordance were identified (peer victimisation, peer rejection, fewer friends, different friends, different attitudes to friendship and dependence on co-twin). Participants described peer relationship discordance arising as a result of chance occurrences, enhanced vulnerability in one twin or discordant behaviour. Consequences of discordant peer relationships were seen as discordance in self-confidence, future plans, social isolation, mental health and interests. In all cases the twin with worse peer experiences was seen as having a worse outcome. Specific hypotheses are presented.

Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:plo:pone00:0180521

DOI: 10.1371/journal.pone.0180521

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