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Sources of error in the Piagetian water-level task.

D Sommerville1, M V Cox

  • 1Department of Psychology, University of York, Heslington, UK.

Perception
|January 1, 1988
PubMed
Summary

Young children

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Area of Science:

  • Cognitive Development
  • Child Psychology

Background:

  • The Piagetian water-level task is a classic test of cognitive development.
  • Previous research suggests young children's performance may be influenced by biases.

Purpose of the Study:

  • To differentiate between two explanations for performance on the Piagetian water-level task.
  • To investigate the impact of a "perpendicular bias" on children's water-level judgments.

Main Methods:

  • Developed novel task materials to distinguish between predictive and perceptual explanations.
  • Conducted experiments with two age groups: 5-6 year olds and 7-8 year olds.
  • Administered both predictive and perceptual versions of the water-level task.

Main Results:

  • Results supported the "perpendicular bias" explanation proposed by Ibbotson and Bryant.
  • The perpendicular bias effect was less pronounced in the perceptual task compared to the predictive task.
  • This effect diminished further in older children (7-8 year olds).

Conclusions:

  • Children's performance on the water-level task is significantly influenced by a perpendicular bias.
  • The perceptual version of the task may mitigate this bias, especially in older children.

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