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Related Experiment Videos

Visual transformation of size.

C Bundesen, A Larsen

    Journal of Experimental Psychology. Human Perception and Performance
    |August 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    Human visual identification of object shape is influenced by size differences. Reaction times increased linearly with object size ratios, suggesting a mental size transformation process.

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    Area of Science:

    • Cognitive Psychology
    • Visual Perception
    • Human Factors

    Background:

    • Understanding how humans perceive and identify objects is crucial in various fields.
    • The influence of object size on visual identification accuracy and speed requires further investigation.

    Purpose of the Study:

    • To investigate human visual identification of identically shaped objects of varying sizes.
    • To measure reaction times associated with matching shapes across different linear size ratios.

    Main Methods:

    • Three experiments were conducted using simultaneously presented random figures.
    • Reaction times for correct identification of same-shaped and oriented figure pairs were measured.
    • Linear size ratios between figure pairs were systematically varied.

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    Main Results:

    • Reaction time consistently increased approximately linearly with the linear size ratio of the figures.
    • This linear relationship was observed for both test pairs and control pairs in the second experiment.
    • The findings indicate a size-dependent effect on visual shape identification.

    Conclusions:

    • The human visual system appears to employ a gradual mental size transformation process when comparing shapes of different sizes.
    • This process is fundamental to accurately identifying objects as identically shaped, irrespective of their scale.