Misattribution of self-generated speech in relation to hallucinatory proneness and delusional ideation in healthy volunteers.

Allen, P; Freeman, D; Johns, L; McGuire, P

Journal article

Misattribution of self-generated speech in relation to hallucinatory proneness and delusional ideation in healthy volunteers.

Abstract:: When patients with hallucinations and delusions encounter their own distorted speech they tend to mistakenly attribute it to someone else. This external misattribution of self-generated material is thought to be associated with 'positive' psychotic symptoms. The aim of the present study was to examine this process in relation to the predisposition to hallucination-like experiences and unusual beliefs in a healthy population. Fifty-seven volunteers completed assessments of hallucination proneness and delusional ideation and performed a source-monitoring task. Participants listened to a series of pre-recorded words for which the source (self/non-self) and acoustic quality (undistorted/distorted) of the speech were varied across trials. Participants indicated whether the words were spoken in their own or another person's voice via a button press. Misattribution errors were greatest when participants made source judgements about their own distorted speech (p < 0.01) and were positively correlated with delusional ideation scores, particularly the level of conviction with which delusional ideas were held (p = 0.03), and there was a trend for a positive correlation with hallucination proneness scores. There was a negative correlation between unsure responses and delusional ideation when participants were processing their own distorted speech (p = -0.03). The misattribution of self-generated speech occurs in healthy individuals with high levels of psychotic-like experiences. This suggests that the same cognitive impairments may underlie psychotic phenomena in healthy individuals as in patients with psychotic disorders, consistent with a continuum model of psychosis.

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APA Style

Allen, P., Freeman, D., Johns, L., & McGuire, P. (2006). Misattribution of self-generated speech in relation to hallucinatory proneness and delusional ideation in healthy volunteers. Schizophrenia Research, 84(2-3), 281–288.

MLA Style

Allen, P., et al. “Misattribution of Self-Generated Speech in Relation to Hallucinatory Proneness and Delusional Ideation in Healthy Volunteers.” Schizophrenia Research, vol. 84, no. 2-3, 2006, pp. 281–88.

Chicago Style

Allen, P, D Freeman, L Johns, and P McGuire. 2006. “Misattribution of Self-Generated Speech in Relation to Hallucinatory Proneness and Delusional Ideation in Healthy Volunteers.” Schizophrenia Research 84 (2-3): 281–88.
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