Perception & Psychophysics

, Volume 66, Issue 5, pp 868–871 | Cite as

Valid distinctions between conscious and unconscious perception?

  • Steven J. HaaseEmail author
  • Gary D. Fisk
Comments and Reply


In this commentary, we discuss the strengths and limitations of Snodgrass, Bernat, and Shevrin’s (2004) theory of unconscious perception. Our commentary centers on the value of signal detection theory (SDT) to understanding the unconscious perception controversy, a value that Snodgrass et al. for the most part agree with (i.e., that most approaches to studying unconscious perception are invalid because they have confounded the criterion for detection with the criterion for awareness). However, we believe that their model relies on a somewhat restricted application of SDT. We discuss how SDT can be better applied to provide the necessary tests to validate their model.


Unconscious Perception Subjective Threshold Unconscious Influence Objective Threshold Signal Detection Theory Model 
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Copyright information

© Psychonomic Society, Inc. 2004

Authors and Affiliations

  1. 1.Department of Psychology, 101 FSCShippensburg UniversityShippensburg
  2. 2.Georgia Southwestern State UniversityAmericus

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