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No effect of multi-axis dot pattern symmetry on subjective duration
Alexis David James Makin1, Afzal Rahman1, Marco Bertamini1
1Department of Psychological Sciences, University of Liverpool, Liverpool, United Kingdom.
Plos One
|December 31, 2020
Summary
Previous studies suggested symmetrical stimuli increase perceived duration. This study found no evidence that symmetry or the number of symmetry axes affects subjective time perception, even with adequate statistical power.
Area of Science:
- Cognitive psychology
- Visual perception
- Time perception
Background:
- Prior research indicates symmetrical stimuli are perceived as longer than asymmetrical ones, a finding replicated across various methods.
- This phenomenon suggests a potential link between visual symmetry and the subjective experience of time.
Purpose of the Study:
- To replicate the established effect of visual symmetry on subjective duration.
- To investigate if the number of symmetrical axes further modulates this effect on time perception.
Main Methods:
- Participants judged the duration of visual stimuli that varied in symmetry.
- The number of symmetrical axes was systematically manipulated.
- Statistical analyses were performed to detect effects on perceived duration.
Main Results:
- No significant evidence was found to support the hypothesis that symmetry influences subjective duration.
- The number of symmetrical axes did not demonstrably alter perceived time.
- Null results were robust and not attributable to statistical limitations or stimulus properties.
Conclusions:
- The widely reported effect of symmetry on subjective duration may be paradigm-specific.
- This study contributes a null result to the literature, highlighting the need for careful consideration of experimental context.
- Researchers in symmetry and time perception should be aware of these findings, particularly concerning the reproducibility crisis.

