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The American Journal of Psychiatry, VOL. 158, No. 9

Letter to the Editor | September 01, 2001

Memory Training in Schizophrenia

MARKO JELICIC, PH.D.

Am J Psychiatry 2001;158:1529-1529. 10.1176/appi.ajp.158.9.1529

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To the Editor: I read the article by Bruce E. Wexler, M.D., and colleagues (1) with much interest. The authors studied the effect of cognitive exercises on verbal and nonverbal memory performance in eight patients with schizophrenia. Three patients exhibited improved performance after training on a verbal memory task (but not on a nonverbal memory test). In these patients, verbal memory gains were associated with an increase in activation of the left frontal cortex on functional magnetic resonance imaging. The authors concluded that verbal memory deficits can be ameliorated by memory exercises in some patients with schizophrenia.

In my opinion, the authors’ conclusion should be treated with some caution. It is possible that the patients showed improved verbal memory performance merely because of repeated testing. My colleagues and I recently conducted a study of the effect of repeated testing on cognitive functioning in psychiatric patients (2) and found substantial gains in the patients’ cognitive performance as a result of repeated testing. Had Dr. Wexler and colleagues used a control group consisting of schizophrenic patients who were not undergoing a training program and reported that none of the control patients showed improved performance in verbal memory tasks, it would have been convincing evidence for an effect of memory exercises on memory function in patients with schizophrenia.

References

Wexler BE, Anderson M, Fulbright RK, Gore JC: Preliminary evidence of improved verbal working memory performance and normalization of task-related frontal lobe activation in schizophrenia following cognitive exercises. Am J Psychiatry2000; 157:1694- 1697

Jelicic M, Derix MMA, Henquet C, Jolles J: Test-retest stability of the Behavioral Assessment of the Dysexecutive Syndrome (BADS) in psychiatric patients (abstract). J Int Neuropsychol Soc 2000; 6:414

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MARKO JELICIC; Memory Training in Schizophrenia. American Journal of Psychiatry. 2001 Sep;158(9):1529-1529.

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