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Children's errors in copying angles: perpendicular error or bisection error?

J G Bremner, A J Taylor

    Perception
    |January 1, 1982
    PubMed
    Summary
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    Young children tend to bisect angles when drawing, distorting figures towards symmetry. This angle bisection tendency explains difficulties in representing horizontal and vertical lines accurately.

    Area of Science:

    • Cognitive Development
    • Developmental Psychology
    • Geometry

    Background:

    • Children often struggle with drawing horizontal and vertical lines, as noted by Piaget and Inhelder.
    • A recent study suggested children distort acute angles, making them resemble right angles.

    Purpose of the Study:

    • To test if children's angle reproduction difficulties stem from a general tendency to bisect angles.
    • To investigate the role of angle bisection in children's geometric representations.

    Main Methods:

    • A study involving 5-year-old children reproducing bisected and nonbisected figures.
    • Analysis of distortions in angle reproduction, particularly concerning right angles and symmetry.

    Main Results:

    Related Experiment Videos

  • Children accurately reproduced bisected figures.
  • Nonbisected figures were distorted towards bisection, even when containing a right angle.
  • This bisection effect was observed only with oblique-baseline figures.

    • Conclusions:

    • Children's drawing difficulties may be explained by a tendency to bisect angles or increase figure symmetry.
    • Horizontal or vertical baselines seem to inhibit this distortion tendency due to perceived asymmetry.