Re-examining Kohlberg's conception of morality in schizophrenia
Jonathan McGuire1, Linda Barbanel1, Martin Brüne2
1a Department of Cognitive Science and ARC Centre of Excellence in Cognition and its Disorders , Macquarie University , Sydney , NSW , Australia.
Introduction:
Early clinical descriptions of and research with people with schizophrenia described apparent difficulties in moral judgement and sensitivity. However, this research failed to take into account the effect of cognitive deficits and symptoms on task performance.
Methods:
We assessed people with schizophrenia on the Moral Judgement Interview, a task used in the earlier literature, alongside a battery of neuro- and social-cognitive tasks.
Results:
Whereas people with schizophrenia perform more poorly on this task than controls, this is mediated by memory and declarative theory of mind, and also impacted by negative symptoms.
Conclusions:
These results indicate that performance deficits on moral judgement tasks are not a universal feature of schizophrenia, but rather due to associated difficulties such as those in social cognition.
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