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Related Experiment Videos

Internal clock processes and the filled-duration illusion.

John H Wearden1, Roger Norton, Simon Martin

  • 1School of Psychology, Keele University, Keele, STS, England, UK. j.h.wearden@psy.keele.ac.uk

Journal of Experimental Psychology. Human Perception and Performance
|June 15, 2007
PubMed
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Subjective time perception differs for filled versus unfilled stimuli. Filled tones were perceived as significantly longer than unfilled intervals, impacting duration judgments in timing research.

Area of Science:

  • Cognitive psychology
  • Psychophysics
  • Neuroscience

Background:

  • Accurate time perception is crucial for various cognitive functions.
  • Previous research has explored factors influencing duration judgments, but the specific impact of stimulus modality (filled vs. unfilled) requires further clarification.

Purpose of the Study:

  • To investigate how the subjective experience of duration differs between filled auditory stimuli (tones) and unfilled auditory intervals (defined by clicks or gaps).
  • To explore the underlying mechanisms of temporal perception using established timing models.

Main Methods:

  • Three experiments were conducted using temporal generalization and verbal estimation procedures.
  • Participants judged the duration of auditory stimuli, including filled tones and unfilled intervals.

Related Experiment Videos

  • Data were analyzed using the pacemaker-switch-accumulator clock model within scalar timing theory.

    • Main Results:

    • Filled stimuli (tones) were consistently perceived as longer in duration than unfilled intervals, even when physical durations were identical.
    • Unfilled intervals were judged to be approximately 55%-65% of the duration of filled stimuli.
    • The pacemaker-switch-accumulator model suggests higher pacemaker speed for filled stimuli explains the difference.

    Conclusions:

    • The modality of auditory stimuli significantly influences subjective time perception.
    • Filled auditory stimuli lead to an overestimation of duration compared to unfilled intervals.
    • While pacemaker speed is a likely explanation, attentional factors cannot be definitively excluded.