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Source monitoring for actions in adolescents with 22q11.2 deletion syndrome (22q11DS)

Published online by Cambridge University Press:  16 November 2007

M. Debbané ,
M. Van der Linden ,
B. Glaser  and
S. Eliez
M. Debbané*
Affiliation:
Service Médico-Pédagogique Research Unit, Department of Psychiatry, University of Geneva School of Medicine, Switzerland Faculty of Psychology, University of Geneva, Switzerland
M. Van der Linden
Affiliation:
Service Médico-Pédagogique Research Unit, Department of Psychiatry, University of Geneva School of Medicine, Switzerland Faculty of Psychology, University of Geneva, Switzerland
B. Glaser
Affiliation:
Service Médico-Pédagogique Research Unit, Department of Psychiatry, University of Geneva School of Medicine, Switzerland Faculty of Psychology, University of Geneva, Switzerland
S. Eliez
Affiliation:
Service Médico-Pédagogique Research Unit, Department of Psychiatry, University of Geneva School of Medicine, Switzerland Department of Genetic Medicine and Development, University of Geneva School of Medicine, Switzerland
*
*Address for correspondence: M. Debbané, Service Médico-Pédagogique, Department of Psychiatry, University of Geneva School of Medicine, 16–18 Boulevard St-Georges, Case Postale 50, 1211 Geneva 8, Switzerland. (Email: martin.debbane@medecine.unige.ch)
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Abstract

Background

Source monitoring consists in identifying the origin of mental events. Recent research suggests that confusions over internally generated mental events may represent a cognitive marker for increased proneness to psychotic symptoms and disorders. We have examined source monitoring for actions in adolescents with the 22q11.2 deletion syndrome (22q11DS), a neurogenetic disease associated with high rates of schizophrenia during adulthood, and expected to observe source monitoring deficits in comparison to IQ-matched and typically developing controls.

Method

Eighteen adolescents with 22q11DS, 17 adolescents matched for age and IQ, and also 17 adolescents matched for age participated in this study. Our adapted action monitoring paradigm asked subjects to visualize a series of actions in three different conditions: (1) visualize themselves performing the action; (2) visualize the experimenter performing the action; or (3) simply repeat the action statements without visualization of the action performer.

Results

The adolescents with 22q11DS performed adequately in terms of recognition (hits), but in comparison to both control groups, they committed more source confusions on correctly recognized items. Further examination revealed that the adolescents were more likely to demonstrate confusions between exterior sources in which the self was not involved.

Conclusions

Source monitoring deficits can be observed in adolescents with 22q11DS, a syndrome putting them at high risk for developing schizophrenia. These deficits are discussed in terms of early cognitive processes associated with genetic risk for schizophrenia.

Keywords

Memoryschizophreniaself-monitoringVCFS
Type
Original Articles
Information
Psychological Medicine , Volume 38 , Issue 6 , June 2008 , pp. 811 - 820
Copyright
Copyright © Cambridge University Press 2007

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