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Related Experiment Video

Updated: May 6, 2026

A Method for Evaluating Timeliness and Accuracy of Volitional Motor Responses to Vibrotactile Stimuli
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Motion-direction specificity for adaptation-induced duration compression depends on temporal frequency.

Aurelio Bruno1, Eugenie Ng, Alan Johnston

  • 1Department of Cognition, Perception and Brain Sciences, University College London, London, UK.

Journal of Vision
|October 30, 2013
PubMed
Summary
This summary is machine-generated.

Adapting to visual motion alters perceived duration. While some motion adaptation effects are direction-independent, higher frequencies show significant duration compression even with opposite motion directions, suggesting dual processing pathways.

Keywords:
motion direction specificityperceived durationpsychophysicstemporal frequency adaptation

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Area of Science:

  • Visual perception
  • Neuroscience
  • Psychophysics

Background:

  • Adaptation to visual stimuli can alter subsequent perception.
  • Motion aftereffects, like duration compression, depend on stimulus properties.
  • Previous research shows conflicting results regarding motion direction's role in duration adaptation.

Purpose of the Study:

  • To investigate the influence of relative motion direction on visual duration compression.
  • To explore this relationship across a wider range of speeds and narrow-band stimuli.
  • To differentiate between cortical and subcortical contributions to duration perception.

Main Methods:

  • Participants adapted to oscillating or drifting gratings at various temporal frequencies.
  • Perceived temporal frequency was measured post-adaptation.
  • Stimuli were matched for apparent rate to isolate duration compression effects.
  • Duration compression was assessed for same and opposite motion directions.

Main Results:

  • Duration compression occurred for both same and opposite motion directions at higher temporal frequencies (above 3 Hz).
  • At 3 Hz, adaptation in the opposite direction had a marginal effect on duration.
  • Higher frequencies demonstrated substantial duration compression even with opposing motion, indicating direction specificity.

Conclusions:

  • Two systems likely contribute to apparent duration compression: a direction-dependent cortical system and a direction-independent subcortical system.
  • The subcortical system becomes more prominent at higher temporal frequencies.
  • Cortical involvement is implied by direction specificity, but subcortical feedback loops may also play a role.