Sciweavers

Share
COGSCI
2004

Characterizing perceptual learning with external noise

9 years 2 months ago
Characterizing perceptual learning with external noise
Performance in perceptual tasks often improves with practice. This effect is known as `perceptual learning,' and it has been the source of a great deal of interest and debate over the course of the last century. Here, we consider the effects of perceptual learning within the context of signal detection theory. According to signal detection theory, the improvements that take place with perceptual learning can be due to increases in internal signal strength or decreases in internal noise. We used a combination of psychophysical techniques (external noise masking and double-pass response consistency) that involve corrupting stimuli with externally added noise to discriminate between the effects of changes in signal and noise as observers learned to identify sets of unfamiliar visual patterns. Although practice reduced thresholds by as much as a factor of 14, internal noise remained virtually fixed throughout training, indicating learning served to predominantly increase the strength...
Jason M. Gold, Allison B. Sekuler, Partrick J. Ben
Added 17 Dec 2010
Updated 17 Dec 2010
Type Journal
Year 2004
Where COGSCI
Authors Jason M. Gold, Allison B. Sekuler, Partrick J. Bennett
Comments (0)
books