Schizophrenia is not just a “cognitive” illness; patients also suffer from disturbances in emotional processing and in their reactions to stressful events. Research on emotion and stress in schizophrenia has tended to proceed independently of research on cognition. Nonetheless, there are intriguing hints that important cognitive effects may occur in patients when they are challenged with emotionally salient or stressful stimuli. This is not surprising, given that the dopamine system has been implicated in the stress response, as well as in cognitive functioning.
One hypothesis is that cognitive functioning in schizophrenia patients is particularly susceptible to disruption by emotionally challenging or stressful situations due to an already vulnerable dopamine system. Consistent with this hypothesis, in work recently completed by Deanna Barch and graduate student Jennifer Burbridge we have found that individuals with schizophrenia produce more disturbed speech in response to questions designed to elicit an emotional response as compared to questions designed to elicit a neutral response (Burbridge & Barch, in preparation) .
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