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Related Experiment Videos

Mirror reversal simply explained without recourse to psychological processes.

T Tabata1, S Okuda

  • 1Osaka Prefecture University, Japan. ttabata@pearl.ocn.ne.jp

Psychonomic Bulletin & Review
|April 26, 2000
PubMed
Summary

Mirrors reverse left-right due to optical inversion and axis definition, not psychological processes. This definitive solution resolves the long-standing mirror reversal problem.

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Area of Science:

  • Optics
  • Perception
  • Physics

Background:

  • The mirror reversal problem, 'Why do mirrors reverse left and right but not up and down?', remains a subject of debate.
  • Existing hypotheses often involve complex psychological processes.

Purpose of the Study:

  • To propose a simple and definitive solution to the mirror reversal problem.
  • To clarify the physical and definitional basis of mirror image reversal.

Main Methods:

  • Analysis of the optical inversion inherent in the mirroring process.
  • Examination of the definition of the left-right axis in relation to mirror images.

Main Results:

  • Mirror reversal is explained by the combination of optical inversion and the definition of the left-right axis.

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  • The phenomenon does not necessitate psychological processes.

    • Conclusions:

    • The proposed solution offers a definitive explanation for mirror reversal.
    • This physical explanation contrasts with psychological hypotheses, such as the multiprocess hypothesis.