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Related Experiment Videos

Arithmetic fact retrieval and working memory in schizophrenia.

M Kiefer1, A Apel, M Weisbrod

  • 1University of Ulm, Department of Psychiatry, Leimgrubenweg 12, 89075, Ulm, Germany. markus.kiefer@medizin.uni-ulm.de

Schizophrenia Research
|December 12, 2001
PubMed
Summary
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Arithmetic fact retrieval is preserved in schizophrenia, even with executive control deficits. This study found no arithmetic differences between patients with schizophrenia and healthy controls, suggesting intact core calculation abilities.

Area of Science:

  • Cognitive Neuroscience
  • Psychiatry

Background:

  • Arithmetic ability is crucial for daily life and vocational rehabilitation but is understudied in schizophrenia.
  • Previous studies on arithmetic in schizophrenia used complex tasks, confounding results with working memory impairments.

Purpose of the Study:

  • To investigate arithmetic fact retrieval and working memory functions in patients with schizophrenia.
  • To differentiate between arithmetic abilities and executive functions in schizophrenia.

Main Methods:

  • Assessed single-digit multiplication and division fact retrieval using a result verification task minimizing working memory load.
  • Evaluated working memory using digit span forward (storage) and digit span backward/verbal fluency tasks (executive control).
  • Compared performance between 24 schizophrenic patients and 24 healthy controls.

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Main Results:

  • Schizophrenic patients showed deficits in executive tasks (digit span backward, verbal fluency) but not in working memory storage (digit span forward).
  • No significant differences in arithmetic fact retrieval were found between schizophrenic patients and controls.
  • Task manipulations (problem size, result disparity) affected both groups similarly in arithmetic tasks.

Conclusions:

  • Retrieval of arithmetic facts is preserved in schizophrenia, despite executive control deficits.
  • The cognitive processes underlying arithmetic fact retrieval in schizophrenia are similar to those in healthy individuals.