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In two source memory tests, hallucinating patients with schizophrenia (N=30), compared to non-hallucinating (N=31), are impaired in recognizing internal self-generated items and misattribute them to an external event. They are not impaired in recognizing events from two internal sources. Results support a selective source-monitoring deficit in the occurrence of auditory hallucinations.
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Brunelin et al. (2006) studied this question.
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