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Related Experiment Video

Updated: Apr 17, 2026

Lexical Decision Task for Studying Written Word Recognition in Adults with and without Dementia or Mild Cognitive Impairment
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Implicit memory functioning in schizophrenia: explaining inconsistent findings of word stem completion tasks.

María José Soler1, Juan Carlos Ruiz1, Carmen Dasí1

  • 1Faculty of Psychology, University of Valencia, Avenida Blasco Ibañez, 21, 46010 Valencia, Spain.

Psychiatry Research
|February 11, 2015
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Summary

Implicit memory in schizophrenia appears unimpaired when assessed with word completion tasks. This study found no significant differences between patients and controls, suggesting task methodology is key for future research.

Keywords:
Implicit memoryPrimingSchizophreniaWord stem completion task

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychiatry

Background:

  • The implicit memory profile in schizophrenia remains unclear due to inconsistent findings.
  • Methodological variations in studies may explain discrepancies in implicit memory research in schizophrenia.

Purpose of the Study:

  • To investigate implicit memory functioning in schizophrenia using a word stem completion task.
  • To address methodological factors influencing implicit memory assessment, including stimuli characteristics and priming score calculation.

Main Methods:

  • Utilized a word stem completion task to assess implicit memory.
  • Analyzed data considering lexical and perceptual stimuli properties.
  • Calculated priming scores using three distinct procedural approaches.

Main Results:

  • Schizophrenia patients and healthy controls exhibited comparable performance on the word stem completion task.
  • No significant differences in priming were detected between groups, irrespective of the calculation method.
  • Findings align with previous research using word fragment completion tasks.

Conclusions:

  • Implicit memory is likely unimpaired in schizophrenia when evaluated via word fragment or stem completion tasks.
  • Standardized assessment criteria are recommended for future studies to enhance the sensitivity of implicit memory tasks in schizophrenia research.