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Related Experiment Videos

Auditory isochrony: time shrinking and temporal patterns

G ten Hoopen1, R Hartsuiker, T Sasaki

  • 1Unit of Experimental Psychology, Faculty of Social and Behavioral Sciences, Leiden University, The Netherlands.

Perception
|January 1, 1995
PubMed
Summary

Time shrinking, an illusion where short time intervals seem shorter after shorter ones, significantly impacts auditory rhythm perception. This study confirms its effect on judging temporal patterns up to 200 ms intervals.

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Area of Science:

  • Psychology
  • Auditory Perception
  • Temporal Processing

Background:

  • Previous research indicates time shrinking underestimates short intervals preceded by shorter ones.
  • This phenomenon is hypothesized to significantly affect auditory rhythm perception.

Purpose of the Study:

  • To investigate the effect of time shrinking on the perception of auditory rhythms.
  • To determine the extent to which time shrinking influences anisochrony detection in temporal patterns.

Main Methods:

  • Three experiments were conducted using constant and adaptive methods.
  • Participants judged temporal patterns for anisochrony, manipulated by offsetting sounds.
  • Base intervals ranged from 50 ms to 200 ms.

Main Results:

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  • Time shrinking was found to affect perceived isochrony in sequences with base intervals of 50, 100, and 200 ms.
  • For fast sequences (50 ms), a 30 ms delay was needed to perceive isochrony.
  • The difference limen, not Weber's ratio, remained constant for anisochrony detection up to 200 ms intervals.

Conclusions:

  • Paradoxical results in anisochrony detection can be explained by time shrinking.
  • The study discusses anomalies in rhythm perception and production attributed to time shrinking.