
Am J Psychiatry 162:1975-1977, October 2005
doi: 10.1176/appi.ajp.162.10.1975
© 2005 American Psychiatric Association
Deficits on a Probabilistic Response-Reversal Task in Patients With Pediatric Bipolar Disorder
Tristan Gorrindo, M.D.,
R.J.R. Blair, Ph.D.,
Salima Budhani, B.S.,
Daniel P. Dickstein, M.D.,
Daniel S. Pine, M.D., and
Ellen Leibenluft, M.D.
OBJECTIVE: Patients with bipolar disorder become hyperhedonic when manic and anhedonic when depressed; therefore, it is important to test whether patients with bipolar disorder show deficits on behavioral paradigms exploring reward/punishment mechanisms. METHOD: A probabilistic response-reversal task was administered to 24 bipolar children and 25 comparison subjects. RESULTS: Patients made more errors during probabilistic reversal, took longer to learn the new reward object, and were less likely to meet the learning criterion. CONCLUSIONS: Children with bipolar disorder may have a reversal learning deficit.
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