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Speech lateralisation and phonological skill.

M Annett1

  • 1Department of Psychology, University of Leicester, UK.

Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
|December 1, 1991
PubMed
Summary
This summary is machine-generated.

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Individuals with poorer speech segmentation skills, specifically spoonerisms, were more likely to show a left ear advantage in auditory processing. This finding supports theories linking speech lateralization, ear advantage, and handedness.

Area of Science:

  • Cognitive Neuroscience
  • Psycholinguistics
  • Neuropsychology

Background:

  • Cerebral speech lateralization refers to the dominance of one brain hemisphere for language processing.
  • Ear advantage in dichotic listening tasks is often used as an indicator of speech lateralization.
  • The right shift theory proposes a genetic basis for the evolution of handedness and brain lateralization.

Purpose of the Study:

  • To investigate the relationship between phoneme segmentation abilities and ear advantage in a dichotic listening task.
  • To test the hypothesis that poor performance on a speech task correlates with a left ear advantage.
  • To examine consistency with existing theories of cerebral speech lateralization and handedness.

Main Methods:

  • Seventy-eight undergraduates completed a phoneme segmentation task involving deliberate spoonerisms.

Related Experiment Videos

  • Participants also underwent a dichotic monitoring task to assess ear advantage.
  • Hand preference and hand skill were evaluated.

    • Main Results:

    • A significant proportion of individuals performing poorly on the spoonerism task exhibited a left ear advantage.
    • The observed distribution of results aligns with previous findings on speech lateralization and ear advantage.
    • Data supported predictions derived from the right shift theory of handedness and cerebral speech.

    Conclusions:

    • Poor phoneme segmentation, specifically in spoonerism production, is associated with a left ear advantage.
    • Findings support the link between speech processing efficiency, auditory lateralization, and handedness.
    • The results provide further evidence for the right shift theory's explanatory power.