Perception & Psychophysics

, Volume 17, Issue 4, pp 363–367 | Cite as

Cognitive processing and time perception

  • Ewart A. C. Thomas
  • Wanda B. Weaver


When a visual field is presented for 40 or 80 msec and a subject is asked to judge the duration of the stimulus, judged duration is found to be less when the field is blank than when the field contains three letters, but is the same whether the three letters form a word or not. The perceived difference between “filled” and “blank” fields increases when the subject is required to memorize the presented letters. These data are consistent with a theory which assumes,inter alia, that a stimulus is analyzed by a visual information processor and a timer, that attention is shared between these processors, and that temporal judgments are based on the output of both processors.


Memory Load Information Level Time Perception Acoustical Society ofAmerica Stimulus Information 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. Allan, L., Kristofferson, A. B., &Weins, E. W. Duration discrimination of brief light flashes.Perception & Psychophysics, 1971,9, 327–334.Google Scholar
  2. Avant, L. L., Lyman, P. J., &Antes, J. R. Effects of stimulus familiarity on judged visual duration.Perception & Psychophysics, 1975,17, 253–262.Google Scholar
  3. Buffardi, L. Factors affecting the filled-duration illusion in the auditory, tactual, and visual modalities.Perception & Psychophysics, 1971,10, 292–294.Google Scholar
  4. Burnside, W. Judgment of short time intervals while performing mathematical tasks.Perception & Psychophysics, 1971,9, 404–406.Google Scholar
  5. Creelman, C. D. Human discrimination of auditory duration.Journal of the Acoustical Society of America, 1962,34, 582–593.CrossRefGoogle Scholar
  6. Frankenhaeuser, M.Estimation of time. Stockholm: Almquist & Wiksells, 1969Google Scholar
  7. Kinchla, J. Duration discrimination of acoustically defined intervals in the 1- to 8-sec range.Perception & Psychophysics. 1972,12, 318–320.Google Scholar
  8. Michon, J. A. Studies in subjective duration. II. Subjective time measurement during tasks with different information content.Acta Psychologica, 1965,24, 205–219.CrossRefPubMedGoogle Scholar
  9. Ornstein, R.On the expertence of time. Baltimore. Penguin Books. 1969.Google Scholar
  10. Thomas, E. A. C., &Brown, I. Time perception and the filled duration illusion.Perception & Psychophysics, 1974,16, 449–458.Google Scholar
  11. Treisman, M. Temporal diserimination and the indifference interval. Implications for a model of the “internal clock”Psychological Monographs, 1963,77, No. 13.Google Scholar

Copyright information

© Psychonomic Society, Inc. 1975

Authors and Affiliations

  • Ewart A. C. Thomas
    • 1
  • Wanda B. Weaver
    • 1
  1. 1.Stanford UniversityStanford

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