Perception & Psychophysics

, Volume 35, Issue 2, pp 137–143

The effects of stimulus sequence and probability on perceptual processing

  • Randall S. Hansen
  • Arnold D. Well

DOI: 10.3758/BF03203893

Cite this article as:
Hansen, R.S. & Well, A.D. Perception & Psychophysics (1984) 35: 137. doi:10.3758/BF03203893


Two experiments that tested the hypothesis that the effect of stimulus presentation probability on perceptual processing is a function of the preceding stimulus sequence are reported. Replicating previous findings, the magnitude of the probability effect was affected by stimulus quality. The interaction was unchanged when sequential effects were eliminated from the data. Stimulus quality and sequence displayed an additive relationship. These results suggest that the probability effect on perceptual processing is not an indirect result of sequential effects. Together with the results of Miller and Anbar (1981), they suggest that practice gradually acts to facilitate the perceptual processing of highly probable stimuli.

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Copyright information

© Psychonomic Society, Inc. 1984

Authors and Affiliations

  • Randall S. Hansen
    • 1
  • Arnold D. Well
    • 1
  1. 1.University of MassachusettsAmherst