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Related Experiment Videos

The development of facedness

E Làdavas

    Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
    |December 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Children aged 12-13 showed a left-face advantage in emotional expression, unlike younger children. This developmental finding suggests facial asymmetry in expressing emotions emerges with age.

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    Area of Science:

    • Psychology
    • Neuroscience
    • Developmental Science

    Background:

    • Facial expressions are crucial for social communication.
    • Hemispheric asymmetry in the brain influences facial motor control.
    • The phenomenon of 'facedness' describes lateralized facial expression advantages.

    Purpose of the Study:

    • To investigate age-related differences in facial emotional expression asymmetry.
    • To determine if left-hemiface advantage for emotional expression develops during childhood.

    Main Methods:

    • Photographed 32 children (6-13 years) expressing happiness, sadness, and surprise.
    • Created split-face composites (left and right) from full-face photographs.
    • Assessed emotional expressiveness of left vs. right facial composites by independent observers.

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    Main Results:

    • Older children (12-13 years) showed greater expressiveness in left-face composites compared to right.
    • Younger children (6-11 years) exhibited no significant left-right asymmetry in expressiveness.
    • Asymmetry was consistent across emotions and not linked to facial size differences.

    Conclusions:

    • The left-hemiface advantage for emotional expression develops during childhood, likely due to growth and maturation.
    • This facial asymmetry may reflect underlying right-hemispheric dominance for voluntary facial control.
    • The precise neural mechanisms driving 'facedness' require further investigation.