Working memory and schizophrenia: evidence for slowed encoding.

Journal Article (Journal Article)

Previous studies have found impairments in working memory in individuals with schizophrenia, but have not identified the underlying information processing deficit. Because schizophrenia is associated with slowed cognitive processing, deficits on working memory tests may be due to decreased speed of encoding rather than an inability to maintain information over time. This hypothesis was examined using a Delayed Match to Sample (DMTS) Test. Task difficulty under 0-delay conditions was equated by individually establishing the stimulus presentation time needed to reach approximately 80% accuracy. Schizophrenia participants required longer presentation durations, but there were no group differences under delay conditions when performance was equated in the 0-delay condition. These results suggest that poor working memory performance in schizophrenia results from slowed encoding processes.

Full Text

Duke Authors

Cited Authors

  • Hartman, M; Steketee, MC; Silva, S; Lanning, K; McCann, H

Published Date

  • February 2003

Published In

Volume / Issue

  • 59 / 2-3

Start / End Page

  • 99 - 113

PubMed ID

  • 12414067

Electronic International Standard Serial Number (EISSN)

  • 1573-2509

International Standard Serial Number (ISSN)

  • 0920-9964

Digital Object Identifier (DOI)

  • 10.1016/s0920-9964(01)00366-8


  • eng