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Effect on Perceived Weight of Object Shapes.

Taebeum Ryu1, Jaehyun Park2, Olga Vl Bitkina2

  • 1Department of Industrial and Management Engineering, Hanbat National University, Daejeon 34158, Korea.

International Journal of Environmental Research and Public Health
|August 26, 2022
PubMed
Summary
This summary is machine-generated.

Object shape influences perceived weight, impacting size-weight illusions. This study found that at the same volume, spheres felt heavier than cubes, which felt heavier than tetrahedrons, affecting sensory perception.

Keywords:
perceived weightshapesizesize-weight illusionuser experienceweight

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Area of Science:

  • Psychology
  • Neuroscience
  • Human Factors

Background:

  • Perceived weight is influenced by object properties like size, color, and material, leading to illusions.
  • Subjective size perception, crucial for motor skills and rehabilitation, is affected by object shape, not just volume.
  • Previous studies on shape's effect on perceived weight yielded inconsistent results.

Purpose of the Study:

  • To investigate the impact of object shape on perceived weight, independent of physical volume.
  • To determine if shape contributes to the size-weight illusion.
  • To analyze the relationship between subjective size perception and perceived weight across different shapes.

Main Methods:

  • Objects of identical volumes but varying shapes (tetrahedron, cube, sphere) were used.
  • Volumes ranged from 64,000 to 216,000 cm³, with proportional weights (100g to 200g).
  • Thirty-eight college students evaluated perceived weight using the modulus method for sensory size measurement.

Main Results:

  • Both object weight (volume) and shape significantly affected perceived weight.
  • The size-weight illusion was confirmed, with shape playing a key role.
  • Perceived weight decreased in the order: sphere, cube, tetrahedron, at constant volume.

Conclusions:

  • Object shape significantly influences perceived weight, contributing to the size-weight illusion.
  • Subjective size perception varies with shape, with tetrahedrons appearing smallest and spheres largest at equal volumes.
  • Understanding shape-based weight perception is vital for fields like child development and neurological rehabilitation.