Identity state-dependent self-relevance and emotional intensity ratings of words in dissociative identity disorder: A controlled longitudinal study.

Autor: Strouza AI; Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK.; Department of Psychiatry, Amsterdam UMC, Location VUmc, VU University Amsterdam, Amsterdam, The Netherlands., Lawrence AJ; Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK., Vissia EM; Heelzorg, Centre for Psychotrauma, Zwolle, The Netherlands., Kakouris A; Department of Psychosis Studies, Institute of Psychiatry, King's College London, London, UK., Akan A; Department of Psychosis Studies, Institute of Psychiatry, King's College London, London, UK.; North East London NHS Foundation Trust, London, UK., Nijenhuis ERS; Clienia Littenheid AG, Private Clinic for Psychiatry and Psychotherapy, Littenheid, Switzerland., Draijer N; Department of Psychiatry, VU University Medical Center, Amsterdam, The Netherlands., Chalavi S; Movement Control and Neuroplasticity Research Group, Department of Movement Sciences, KU Leuven, Leuven, Belgium., Reinders AATS; Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London, UK.
Jazyk: angličtina
Zdroj: Brain and behavior [Brain Behav] 2023 Oct; Vol. 13 (10), pp. e3208. Date of Electronic Publication: 2023 Sep 18.
DOI: 10.1002/brb3.3208
Abstrakt: Introduction: Dissociative identity disorder (DID) is characterized by, among others, amnesic episodes and the recurrence of different dissociative identity states. While consistently observed in clinical settings, to our knowledge, no controlled research study has shown the degree to which different identity states report autobiographical knowledge over time. Hence, the current study investigates self-relevance and emotional intensity ratings of words longitudinally.
Methods: Data of 46 participants were included: 13 individuals with DID, 11 DID-simulating actors, and a control group of 22 paired individuals. Individuals with DID and DID simulators participated once in the neutral identity state (NIS) and once in the trauma-related dissociative identity state (TIS). The control group paired 11 healthy controls with 11 participants with posttraumatic stress disorder (PTSD) as a NIS-TIS pair. Self-relevance ratings of different word types were collected in a baseline and a follow-up session, on average 6 weeks apart. A mixed ANOVA design was used to assess the effects of group, session, word type, and dissociative identity state.
Results: All participants in TIS and individuals with DID in NIS rated self-relevant trauma-related words more negatively. In the NIS, the control group rated self-relevant trauma-related words as less negative, whereas the ratings of simulating actors were intermediate. There was no group-dependent longitudinal effect for intensity ratings.
Conclusions: This study was the first to confirm clinical observations that self-relevant and emotional processing are different between individuals with DID and controls, but consistent over time. Actors were unable to perfectly simulate DID. The finding that ratings of self-relevant trauma-related words differ between subgroups as included in the study is in line with clinical observations.
(© 2023 The Authors. Brain and Behavior published by Wiley Periodicals LLC.)
Databáze: MEDLINE
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