Anhedonia—the inability to experience pleasure—is a cardinal symptom of schizophrenia, but its role is poorly understood because it has been subjected to very little systematic research. In the present study, the relationships of anhedonia to a variety of physiological reactivity and threshold measures were studied in a group of 76 psychiatric hospital patients. The results were negative. The results suggest that clinical anhedonia is not a function of hypo-reactivity.
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