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Effect of response programming on hemispheric differences in lexical decision.

G Measso1, E Zaidel

  • 1Department of Psychology, University of California, Los Angeles 90024.

Neuropsychologia
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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This study found a right visual field advantage for word recognition, indicating independent lexical processing in each brain hemisphere. Response programming did not influence these hemispheric differences.

Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Neuroscience

Background:

  • Investigating hemispheric asymmetries in language processing is crucial for understanding brain function.
  • Lexical decision tasks are standard tools for probing word recognition mechanisms.

Purpose of the Study:

  • To examine hemispheric differences in lexical decision tasks using different response conditions.
  • To determine if response programming affects visual field advantages in word recognition.
  • To evaluate existing psycholinguistic models of lexical access.

Main Methods:

  • Administered a lateralized tachistoscopic lexical decision task to normal subjects.
  • Utilized concrete nouns and regular nonwords across Yes-No and Go-NoGo response conditions.

Related Experiment Videos

  • Measured accuracy, sensitivity, and latency for stimuli presented in the left and right visual fields.

    • Main Results:

    • Observed an overall right visual field advantage in accuracy and sensitivity.
    • Found an interaction between visual hemifield and wordness in response latency.
    • Confirmed that experimental conditions did not interact with visual field effects, suggesting response programming is independent of hemispheric asymmetries.

    Conclusions:

    • Lexical access appears to be independent and similarly processed in both hemispheres.
    • Response programming is also similar across hemispheres and does not influence observed asymmetries.
    • The findings support a psycholinguistic model proposing separate, parallel computations for word and nonword decisions within each hemisphere.