ArticleDiscover mental health2025
Case study of the separation-individuation process in an identical twin following the onset of schizophrenia in a sibling.
Article in Discover mental health, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
3 authors.
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Abstract
backgroundFew studies have explored the experience of psychosis within twin pairs. Developmental processes such as separation-individuation might be particularly vulnerable when one twin develops a psychotic disorder. This study examines the separation-individuation challenges that may arise in twinships when one co-twin is affected by psychosis.
methodThis case study examines a 26-year-old male whose twin brother was diagnosed with schizophrenia. Two research interviews were conducted with him, and a thematic analysis was performed to identify recurrent issues related to his twin relationship.
resultsAnalysis revealed four primary themes: relationship intensity, separation, guilt, and reparation. DISCUSSION: The typical separation-individuation process within twinships appears to be further complicated by the presence of a psychotic disorder in one twin. These findings underscore the importance of evaluating potential identity issues in the unaffected twin and suggest avenues for further research on clinical support for twin dyads affected by psychosis.
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