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A test of Kinsbourne's selective activation model

G J Demakis1, D W Harrison, M Campen

  • 1Department of Psychology, Virginia Polytechnic Institute State University, Blacksburg 24061.

The International Journal of Neuroscience
|October 1, 1993
PubMed
Summary

This study tested Kinsbourne's selective activation model by priming brain hemispheres. Researchers found no preferential hemisphere activation, but significant interference effects, particularly with happy faces.

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Area of Science:

  • Cognitive Neuroscience
  • Neuropsychology
  • Human Brain Function

Background:

  • Kinsbourne's selective activation model proposes that cognitive tasks preferentially engage one cerebral hemisphere.
  • Understanding hemispheric specialization is crucial for explaining cognitive processes and potential deficits.

Purpose of the Study:

  • To investigate the validity of Kinsbourne's selective activation model in right-dominant males.
  • To examine whether specific priming tasks (verbal vs. imagery) preferentially activate distinct cerebral hemispheres.

Main Methods:

  • 28 right-dominant males performed an affect recognition task (happy/angry faces) under three conditions: control, left hemisphere priming (verbal rehearsal), and right hemisphere priming (imagery).
  • Reaction times were measured for stimuli presented in the left and right visual fields.

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Main Results:

  • No evidence of preferential hemisphere activation or decreased reaction time due to priming was observed.
  • Both priming tasks induced significant interference effects across visual fields compared to the control condition.
  • Processing of happy faces was more susceptible to interference than angry faces.

Conclusions:

  • The findings do not support Kinsbourne's selective activation model as implemented in this study.
  • Hemispheric interference effects suggest a less specialized recruitment than predicted.
  • Differential susceptibility to interference for happy versus angry faces warrants further investigation into affect perception laterality.