ERIC Number: EJ697483
Record Type: Journal
Publication Date: 2005-Mar
Reference Count: N/A
The Nature of Learned Categorical Perception Effects: A Psychophysical Approach
Notman, Leslie, A.; Sowden, Paul T.; Ozgen, Emre
Cognition, v95 n2 pB1-B14 Mar 2005
Categorical perception is often cited as a striking example of cognitive influences on perception. However, some evidence suggests the term is a misnomer, with effects based on cognitive not perceptual processing. Here, using a psychophysical approach, we provide evidence consistent with a learned categorical perception effect that is dependent on analysis within the visual processing stream. An improvement in participants' discrimination between grating patterns that they had learned to place in different categories was 'tuned' around the orientation of the patterns experienced during category learning. Thus, here, categorical perception may result from attentionally modulated perceptual learning about diagnostic category features, based upon orientation-selective stages of analysis. This argues strongly that category learning can alter our perception of the world.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Authoring Institution: N/A