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Developmental instability and cerebral lateralization

R A Yeo1, S W Gangestad, R Thoma

  • 1Department of Psychology, University of New Mexico, Albuquerque 87131, USA.

Neuropsychology
|November 5, 1997
PubMed
Summary
This summary is machine-generated.

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Greater developmental instability, indicated by physical anomalies, correlates with atypical brain lateralization on cognitive tasks. This suggests developmental instability affects cognitive skill variations and handedness.

Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Human Biology

Background:

  • Prior research links handedness variations to developmental instability.
  • Developmental instability is often assessed via minor physical anomalies and fluctuating asymmetries.

Purpose of the Study:

  • To investigate the relationship between developmental instability and cognitive task lateralization.
  • To determine if variations in cognitive asymmetry scores relate to developmental instability markers.

Main Methods:

  • Administered four cognitive tasks measuring functional asymmetries to university students (N=146).
  • Tasks included dichotic listening, line bisection, and chimeric/cartoon faces tasks.
  • A composite developmental instability score was calculated from physical anomalies and asymmetries.

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Main Results:

  • Participants with higher developmental instability showed more atypical lateralization scores.
  • Atypical scores deviated more from the sample mean, irrespective of direction.
  • No association was found between directional asymmetries and developmental instability.

Conclusions:

  • Developmental instability is associated with variations in cognitive skill lateralization.
  • This relationship extends beyond handedness, impacting cognitive processing.
  • Findings highlight developmental instability's role in neurodevelopmental variations.