Perception & Psychophysics

, Volume 69, Issue 6, pp 1009–1021 | Cite as

Perceptual learning in monocular pattern masking: Experiments and explanations by the twin summation gain control model of contrast processing

  • Goro MaeharaEmail author
  • Ken Goryo


We investigated practice effects on contrast thresholds for target patterns. Results showed that practice decreased contrast thresholds when targets were presented on maskers. Thresholds tended to decrease more at the higher end of the masker contrast range. At least partially, learning transferred to stimuli of the untrained phase. We simulated changes in threshold versus contrast functions using a contrast-processing model and then fit the model to pre- and posttraining data. The simulation results and model fit suggest that learning in pattern masking can be accounted for by changes in nonlinear transducer functions for divisive inhibitory signals.


Spatial Frequency Perceptual Learning Learning Transfer Pattern Masking Contrast Threshold 
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.


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Copyright information

© Psychonomic Society, Inc. 2007

Authors and Affiliations

  1. 1.Kyoto Women’s UniversityKyotoJapan
  2. 2.McGill Vision ResearchMontrealCanada

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