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Sex, gender, and neuropsychological functioning in schizophrenia
Richard R J Lewine1, Bonnie-Jean Thurston-Snoha, Rose Ardery
1Department of Psychological and Brain Sciences, 317 Life Sciences Building, University of Louisville, Louisville, KY 40292, USA. rich.lewine@louisville.edu
Journal of Clinical and Experimental Neuropsychology
|October 20, 2006
Summary
This study reveals significant gender differences in neuropsychological functioning among individuals with schizophrenia/schizoaffective disorder, unlike sex differences. Executive functioning remains unaffected, highlighting its potential as a schizophrenia marker.
Area of Science:
- Neuroscience
- Psychiatry
- Psychology
Background:
- Sex and gender are distinct concepts with implications for neuropsychological research.
- Previous research identified sex differences in neuropsychological tasks, but lacked systematic investigation of gender differences.
- Understanding these distinctions is crucial for accurate interpretation of cognitive functioning in psychiatric populations.
Purpose of the Study:
- To investigate the independent effects of sex and gender on neuropsychological functioning.
- To compare sex and gender differences across seven neuropsychological domains.
- To identify potential behavioral markers for schizophrenia/schizoaffective disorder.
Main Methods:
- A cohort of 197 patients with schizophrenia/schizoaffective disorder and 94 healthy controls were assessed.
- Seven distinct domains of neuropsychological functioning were evaluated.
- Statistical analyses examined main effects of sex and gender, and their interaction.
Main Results:
- Main effects of sex were observed in two neuropsychological domains.
- Main effects of gender were found in five neuropsychological domains.
- No interaction effects between sex and gender were detected across any domain.
- Healthy individuals outperformed patients with schizophrenia/schizoaffective disorder.
- Executive functioning remained unaffected by either sex or gender.
Conclusions:
- Gender, more than sex, significantly influences neuropsychological performance in schizophrenia/schizoaffective disorder.
- Executive functioning's independence from sex and gender supports its utility as a potential biomarker for schizophrenia.
- Distinguishing between sex and gender is essential for nuanced understanding of cognitive variations in mental health conditions.
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