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Dissociation mediates the relationship between childhood trauma and hallucination-proneness.

Journal Article


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Abstract


  • BACKGROUND:

    It has been proposed that the relationship between childhood trauma and hallucinations can be explained by dissociative processes. The present study examined whether the effect of childhood trauma on hallucination-proneness is mediated by dissociative tendencies. In addition, the influence of dissociative symptoms on a cognitive process believed to underlie hallucinatory experiences (i.e. reality discrimination; the capacity to discriminate between internal and external cognitive events) was also investigated.MethodPatients with schizophrenia spectrum disorders (n=45) and healthy controls (with no history of hallucinations; n=20) completed questionnaire measures of hallucination-proneness, dissociative tendencies and childhood trauma, as well as performing an auditory signal detection task.

    RESULTS:

    Compared to both healthy and non-hallucinating clinical controls, hallucinating patients reported both significantly higher dissociative tendencies and childhood sexual abuse. Dissociation positively mediated the effect of childhood trauma on hallucination-proneness. This mediational role was particularly robust for sexual abuse over other types of trauma. Signal detection abnormalities were evident in hallucinating patients and patients with a history of hallucinations, but were not associated with pathological dissociative symptoms.

    CONCLUSIONS:

    These results are consistent with dissociative accounts of the trauma-hallucinations link. Dissociation, however, does not affect reality discrimination. Future research should examine whether other cognitive processes associated with both dissociative states and hallucinations (e.g. deficits in cognitive inhibition) may explain the relationship between dissociation and hallucinatory experiences.

Authors


  •   Varese, Filippo (external author)
  •   Barkus, Emma
  •   Bentall, Richard (external author)

Publication Date


  • 2012

Citation


  • Varese, F., Barkus, E. & Bentall, R. P. (2012). Dissociation mediates the relationship between childhood trauma and hallucination-proneness.. Psychological Medicine, 42 (5), 1025-1036.

Scopus Eid


  • 2-s2.0-84859269675

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3380&context=hbspapers

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/2331

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 1025

End Page


  • 1036

Volume


  • 42

Issue


  • 5

Place Of Publication


  • United Kingdom

Abstract


  • BACKGROUND:

    It has been proposed that the relationship between childhood trauma and hallucinations can be explained by dissociative processes. The present study examined whether the effect of childhood trauma on hallucination-proneness is mediated by dissociative tendencies. In addition, the influence of dissociative symptoms on a cognitive process believed to underlie hallucinatory experiences (i.e. reality discrimination; the capacity to discriminate between internal and external cognitive events) was also investigated.MethodPatients with schizophrenia spectrum disorders (n=45) and healthy controls (with no history of hallucinations; n=20) completed questionnaire measures of hallucination-proneness, dissociative tendencies and childhood trauma, as well as performing an auditory signal detection task.

    RESULTS:

    Compared to both healthy and non-hallucinating clinical controls, hallucinating patients reported both significantly higher dissociative tendencies and childhood sexual abuse. Dissociation positively mediated the effect of childhood trauma on hallucination-proneness. This mediational role was particularly robust for sexual abuse over other types of trauma. Signal detection abnormalities were evident in hallucinating patients and patients with a history of hallucinations, but were not associated with pathological dissociative symptoms.

    CONCLUSIONS:

    These results are consistent with dissociative accounts of the trauma-hallucinations link. Dissociation, however, does not affect reality discrimination. Future research should examine whether other cognitive processes associated with both dissociative states and hallucinations (e.g. deficits in cognitive inhibition) may explain the relationship between dissociation and hallucinatory experiences.

Authors


  •   Varese, Filippo (external author)
  •   Barkus, Emma
  •   Bentall, Richard (external author)

Publication Date


  • 2012

Citation


  • Varese, F., Barkus, E. & Bentall, R. P. (2012). Dissociation mediates the relationship between childhood trauma and hallucination-proneness.. Psychological Medicine, 42 (5), 1025-1036.

Scopus Eid


  • 2-s2.0-84859269675

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3380&context=hbspapers

Ro Metadata Url


  • http://ro.uow.edu.au/hbspapers/2331

Has Global Citation Frequency


Number Of Pages


  • 11

Start Page


  • 1025

End Page


  • 1036

Volume


  • 42

Issue


  • 5

Place Of Publication


  • United Kingdom