Failing to get the gist: Reduced false recognition of semantic associates in semantic dementia

Jon S. Simons, Andy C.H. Lee, Kim S. Graham, Mieke Verfaellie, Wilma Koutstaal, John R. Hodges, Daniel L. Schacter, Andrew E. Budson

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Abstract

In 2 experiments involving patients with semantic dementia, the authors investigated the impact of semantic memory loss on both true and false recognition. Experiment 1 involved recognition memory for categories of everyday objects that shared a predominantly semantic relationship. The patients showed preserved item-specific recollection for the pictorial stimuli but, compared with control participants, exhibited significantly reduced utilization of gist information regarding the categories of objects. The latter result is consistent with the patients' degraded semantic knowledge. Experiment 2 involved categories of abstract objects that were related to one another perceptually rather than semantically. Patients with semantic dementia obtained item-specific recollection and gist memory scores that were indistinguishable from those of control participants. These results suggest that the reduction in gist memory in semantic dementia is largely specific to semantic representations and cannot be attributed to general difficulty with abstracting and/or utilizing gistlike commonalities between stimuli.

Original languageEnglish (US)
Pages (from-to)353-361
Number of pages9
JournalNeuropsychology
Volume19
Issue number3
DOIs
StatePublished - May 1 2005

Keywords

  • Episodic memory
  • False memory
  • Frontotemporal dementia
  • Semantic memory
  • Temporal lobe

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    Simons, J. S., Lee, A. C. H., Graham, K. S., Verfaellie, M., Koutstaal, W., Hodges, J. R., Schacter, D. L., & Budson, A. E. (2005). Failing to get the gist: Reduced false recognition of semantic associates in semantic dementia. Neuropsychology, 19(3), 353-361. https://doi.org/10.1037/0894-4105.19.3.353