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    Area of Science:

    • Psychology
    • Cognitive Science
    • Perception

    Background:

    • Understanding how humans perceive spatial relationships is crucial in cognitive science.
    • Previous research has explored the integration of visual information but has not fully elucidated the processing of distance components.

    Purpose of the Study:

    • To investigate whether judgments of absolute distance rely on overall distance or separate horizontal and vertical components.
    • To test competing models explaining the extraction of spatial information from point pairs.

    Main Methods:

    • Participants performed speeded absolute distance judgments on pairs of points in a frontal plane.
    • Concurrent relative distance judgments were used to assess differential weighting of horizontal versus vertical components.
    • Repetition priming effects were examined for overall, composite, horizontal, and vertical distances.

    Main Results:

    • Performance on absolute distance judgments was facilitated by repeating the overall distance, but not by repeating composite, horizontal, or vertical distances.
    • Concurrent relative judgments revealed differential weighting of horizontal and vertical components, supporting the overall distance account.
    • Findings contradicted models based on a collapsed composite dimension or a decision criterion incorporating both components.

    Conclusions:

    • Perceptual judgments of distance are primarily based on the overall distance between points.
    • Separate horizontal and vertical components are not directly processed but are implicitly weighted within the overall distance calculation.
    • The results support an 'overall distance' model over composite or decisional accounts of spatial perception.