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Psychiatry Res. 2014 Dec 30;220(3):1084-9. doi: 10.1016/j.psychres.2014.08.005. Epub 2014 Aug 19.

The VAGUS insight into psychosis scale--self-report and clinician-rated versions.

Author information

1
Multimodal Imaging Group, Research Imaging Centre, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; Division of Geriatric Psychiatry, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada. Electronic address: philgerretsen@yahoo.com.
2
Schizophrenia Program, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
3
Schizophrenia Program, Centre for Addiction & Mental Health, Toronto, Ontario, Canada.
4
University of Toronto, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
5
Multimodal Imaging Group, Research Imaging Centre, Centre for Addiction & Mental Health, Toronto, Ontario, Canada.
6
Division of Geriatric Psychiatry, Centre for Addiction & Mental Health, Toronto, Ontario, Canada.
7
Multimodal Imaging Group, Research Imaging Centre, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; Schizophrenia Program, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada.
8
Otolaryngology, University Health Network, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
9
Multimodal Imaging Group, Research Imaging Centre, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; Division of Geriatric Psychiatry, Centre for Addiction & Mental Health, Toronto, Ontario, Canada.
10
Multimodal Imaging Group, Research Imaging Centre, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada.
11
Division of Geriatric Psychiatry, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada; Department of Psychiatry, Faculties of Medicine and Health Science, University of Malta, Msida, Malta.
12
Division of Geriatric Psychiatry, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
13
Multimodal Imaging Group, Research Imaging Centre, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; Division of Geriatric Psychiatry, Centre for Addiction & Mental Health, Toronto, Ontario, Canada; University of Toronto, Toronto, Ontario, Canada; Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.

Abstract

The aim of this study was to develop self-report and clinician-rated versions of an insight scale that would be easy to administer, sensitive to small changes, and inclusive of the core dimensions of clinical insight into psychosis. Ten-item self-report (VAGUS-SR) and five-item clinician-rated (VAGUS-CR) scales were designed to measure the dimensions of insight into psychosis and evaluated in 215 and 140 participants, respectively (www.vagusonline.com). Tests of reliability and validity were performed. Both the VAGUS-SR and VAGUS-CR showed good internal consistency and reliability. They demonstrated good convergent and discriminant validity. Both versions were strongly correlated with one another and with the Schedule for the Assessment of Insight and Birchwood Insight Scale. Exploratory factor analyses identified three possible latent components of insight. The VAGUS-CR and VAGUS-SR are valid, reliable and easy to administer. They are build on previous insight scales with separate clinician-rated and self-report versions. The VAGUS-SR exhibited a multidimensional factor structure. Using a 10-point Likert scale for each item, the VAGUS has the capacity to detect small, temporally sensitive changes in insight, which is essential for intervention studies with neurostimulation or rapidly acting medications.

KEYWORDS:

Illness Awareness; Insight; Schizoaffective disorder; Schizophrenia; Symptom assessment

PMID:
25246410
PMCID:
PMC4470623
DOI:
10.1016/j.psychres.2014.08.005
[Indexed for MEDLINE]
Free PMC Article

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