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Related Experiment Videos

Automatic processing in mildly retarded and nonretarded persons

J L Mosley1, J G Ells

  • 1Department of Psychology, University of Calgary, Alberta, Canada.

Journal of Intellectual Disability Research : JIDR
|December 1, 1994
PubMed
Summary

Intellectual disability impairs automatic processing, as mildly retarded adults and children with similar mental ages did not show priming effects. Non-retarded adults, however, exhibited significant semantic and orthographic priming.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Developmental Psychology

Background:

  • Automatic processing is crucial for cognitive functions.
  • Priming tasks assess implicit memory and automaticity.
  • Intellectual disability may affect automatic processing capabilities.

Purpose of the Study:

  • To investigate automatic processing in individuals with intellectual disability using a masked priming task.
  • To compare priming effects across different groups: mildly retarded adults, non-retarded children with matched mental ages, and non-retarded adults.

Main Methods:

  • A masked priming task involving letters/digits was administered.
  • Stimulus onset asynchronies (SOAs) were individually determined and stabilized.
  • Participants included mildly retarded adults, non-retarded children (equal mental age, high mental age), and non-retarded adults (equal chronological age, young adults).

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Main Results:

  • Non-retarded adults demonstrated semantic, categorical, and orthographic priming.
  • Mildly retarded adults and non-retarded children with matched mental ages failed to show priming.
  • These groups even showed enhanced performance in conditions expected to be poorest, suggesting altered processing.

Conclusions:

  • Intellectual disability, particularly at mild levels or when mental age is matched, appears to disrupt automatic cognitive processing.
  • The findings suggest that masked priming relies on specific processing levels that may be compromised in intellectual disability.
  • Letters, unlike digits, may serve as effective primes in masked tasks, analogous to word priming in lexical decision tasks.