Negative symptoms such as anhedonia are associated with psychosis risk and poorer outcomes. The Prodromal Questionnaire (PQ) is a self-report questionnaire used to screen for psychosis spectrum symptoms. However, the convergent and divergent validity and underlying factor structure of the PQ-negative symptom subscale (PQ-N) have yet to be examined. Undergraduates (N = 1,556) completed the PQ, Temporal Experience of Pleasure Scale, and measures assessing anxiety, depression, and motivation. An exploratory factor analysis conducted on the PQ-N yielded a two-factor solution, reflecting subdimensions of social expression and dissociative-depressive experiences, contrary to previous research examining the factor structure of negative symptoms. Associations between the PQ-N, its two factors, and measures of negative symptoms and other psychopathology were examined. Results indicated that the PQ-N and its factors were more strongly correlated with measures of depression and anxiety than with measures of negative symptoms relating to motivation and pleasure, suggesting poor convergent and divergent validity.
Negative symptoms such as anhedonia are associated with n class="Disease">psychosis risk and poorer outcomes. The Prodromal Questionnaire (PQ) is a self-report questionnaire used to screen for psychosis spectrum symptoms. However, the convergent and divergent validity and underlying factor structure of the PQ-negative symptom subscale (PQ-N) have yet to be examined. Undergraduates (N = 1,556) completed the PQ, Temporal Experience of Pleasure Scale, and measures assessing anxiety, depression, and motivation. An exploratory factor analysis conducted on the PQ-N yielded a two-factor solution, reflecting subdimensions of social expression and dissociative-depressive experiences, contrary to previous research examining the factor structure of negative symptoms. Associations between the PQ-N, its two factors, and measures of negative symptoms and other psychopathology were examined. Results indicated that the PQ-N and its factors were more strongly correlated with measures of depression and anxiety than with measures of negative symptoms relating to motivation and pleasure, suggesting poor convergent and divergent validity.
Authors: Georgios D Kotzalidis; Andrea Solfanelli; Daria Piacentino; Valeria Savoja; Paolo Fiori Nastro; Martina Curto; Juliana Fortes Lindau; Alice Masillo; Martina Brandizzi; Francesca Fagioli; Andrea Raballo; Eva Gebhardt; Antonio Preti; Marco D'Alema; Maria Rosa Fucci; Roberto Miletto; Daniela Andropoli; Donato Leccisi; Paolo Girardi; Rachel L Loewy; Frauke Schultze-Lutter Journal: Schizophr Res Date: 2017-02-21 Impact factor: 4.939
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