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    Area of Science:

    • Vision Science
    • Perceptual Psychology
    • Neuroscience

    Background:

    • Visual crowding impairs target perception with nearby flankers.
    • Increasing flankers can paradoxically improve performance (uncrowding).
    • Previous research demonstrated uncrowding with simple shapes like squares.

    Purpose of the Study:

    • To investigate if uncrowding extends to unfamiliar and irregular shapes.
    • To explore the specificity of shape-based interactions in visual crowding.
    • To determine the influence of flanking shape orientation on crowding strength.

    Main Methods:

    • Presented vernier targets with varying numbers and types of flanking shapes at different eccentricities.
    • Tested discrimination performance with simple, familiar, and unfamiliar irregular shapes.
    • Manipulated the orientation of flanking shapes to assess interaction specificity.

    Main Results:

    • Uncrowding effects were observed with unfamiliar and irregular shapes, not just simple ones.
    • Performance improved as the number of flankers increased, extending across a wide visual field.
    • Small changes in flanking shape orientation significantly increased crowding strength.

    Conclusions:

    • Uncrowding is a general phenomenon not limited to simple or familiar shapes.
    • Visual crowding involves highly specific, shape-dependent interactions across large visual areas.
    • These findings challenge assumptions about shape representation in the visual field.