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Abstract
Background. It is well known that individuals with schizophrenia have dopaminergic abnormalities as well as memory-related difficulties, both of which are associated with impulsive decision making. We used a delay discounting measure to test the degree to which patients make future-oriented decisions.
Methods. 42 patients with schizophrenia and 29 healthy participants completed a delay discounting measure along with tests of cognitive function and, in patients, symptom ratings.
Results. Patients discounted more steeply than did comparison participants. Discounting among patients related to memory capacity and tended to relate inversely to negative symptoms.
Conclusions. The impulsive decision making evidenced by patients suggests that they may be prone to choosing immediate over long-term rewards, even when their interests are better served by choosing the latter. Improving cognitive function may enhance their ability to make future-oriented decisions.
Acknowledgments
Funding support was provided by the National Institutes of Mental Health, Grant No. MH72647, to JG. We wish to thank Sharon August, Pablo Diego, Mary Beth Ramsey, Kimberly Bell Warren, and Christopher Wilk for their assistance with data collection.