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Related Experiment Video

Updated: Jul 13, 2026

Visualizing Visual Adaptation
04:43

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Published on: April 24, 2017

Real-world object size as a magnitude dimension: Robust perceived size distance effects and context-sensitive spatial

Melike Şefikoğlu1, Merve Bulut2, Ezgi Gür1

  • 1Izmir University of Economics, Department of Psychology, Izmir, Turkey; Space Magnitude Associations Research Team (SMART Lab), Izmir University of Economics, Izmir, Turkey.

Consciousness and Cognition
|July 11, 2026
PubMed
Summary

Real-world object size is processed similarly to numbers, but its spatial mapping is weak and context-dependent. This research explores how we perceive and spatially map object sizes, finding nuanced results.

Keywords:
Distance-sensitive processingObject sizeObject size judgmentSpatial compatibilityTask setup

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Area of Science:

  • Cognitive psychology
  • Numerical cognition
  • Magnitude processing

Background:

  • Magnitude processing supports numerical comparison and spatial mapping.
  • It is unclear if real-world object size processing mirrors numerical magnitude processing.
  • Previous research focused on numerical cognition, leaving object size processing less understood.

Purpose of the Study:

  • To investigate whether real-world object size processing exhibits characteristics of numerical magnitude processing, specifically distance-sensitive comparison and directional spatial mapping.
  • To examine the influence of task context and mapping order on the spatial representation of object size.
  • To determine if object size is processed as a meaningful magnitude dimension with spatial properties.

Main Methods:

  • Two preregistered experiments adapted numerical cognition paradigms.
  • Participants judged real-world object sizes (smaller/larger) in different task contexts.
  • Analysis included compatibility patterns, SNARC-like effects (Spatial-Numerical Association of Response Codes), and phase-based analyses.

Main Results:

  • A weak SNARC-like tendency was observed, modulated by mapping order and potentially influenced by baseline speeding.
  • Responses quickened with increased perceived size difference, indicating sensitivity to relative magnitude.
  • Compatibility effects were task-dependent and not uniformly expressed, suggesting context sensitivity.

Conclusions:

  • Real-world object size is processed as a meaningful magnitude dimension.
  • The directional spatial expression of object size is weak and highly context-sensitive.
  • Object size processing does not uniformly mirror numerical magnitude processing in its spatial mapping characteristics.