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Interidentity memory transfer in dissociative identity disorder.

Lauren L Kong1, John J B Allen1, Elizabeth L Glisky1

  • 1Department of Psychology, University of Arizona.

Journal of Abnormal Psychology
|August 30, 2008
PubMed
Summary
This summary is machine-generated.

This study investigated memory transfer in dissociative identity disorder (DID). Objective memory tests revealed that explicit memory transfers between identities, contradicting subjective reports of amnesia.

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Area of Science:

  • Psychology
  • Neuroscience
  • Trauma Studies

Background:

  • Controversy exists regarding dissociative identity disorder (DID), particularly concerning the validity of interidentity amnesia.
  • Objective methods are needed to differentiate between explicit and implicit memory transfer in DID.
  • Previous research has yielded conflicting findings on the nature of memory within DID.

Purpose of the Study:

  • To objectively examine explicit memory transfer between identities in individuals with DID.
  • To investigate whether individuals with DID can compartmentalize information, as suggested by interidentity amnesia.
  • To utilize a cross-modal paradigm to minimize implicit memory influences.

Main Methods:

  • A cross-modal memory task was employed with 7 participants diagnosed with DID and 34 matched controls.
  • Words were presented auditorily to one identity, and explicit memory was tested in another identity using a visual exclusion paradigm.
  • The cross-modal design aimed to mitigate implicit memory transfer effects.

Main Results:

  • Despite self-reported amnesia, experimental stimuli memory demonstrably transferred between identities in DID participants.
  • DID participants did not exhibit a superior ability to compartmentalize information compared to controls.
  • The findings suggest that memory transfer observed was likely explicit, not implicit.

Conclusions:

  • Subjective reports of interidentity amnesia in DID may not align with objective measures of explicit memory transfer.
  • Individuals with DID may not possess the compartmentalization abilities suggested by interidentity amnesia.
  • Objective memory testing provides crucial insights into the complex memory processes in dissociative identity disorder.