Talk:Categorical perception
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Stevan Harnad is the expert, but as a former graduate student studying this area, I am somewhat familar with the theory, so I would like to recommend the following points. I think the aricle would be improved if it was written to include these additional points from the seminal research. It may make it slightly more complicated, but I think these points are important to capture the spirit of the original research and theory.
- The ubiquitous relationship between discrimination and identification found in the early, seminal studies: discrimination is no better than absolute identification. This is not included anywhere in this article, is it? Please correct me if I am wrong, but this distinction formed the basis for the definition of categorical perception. If a graph of the classic "inverted V" discrimination function was added, I think that could help explain the fundamental concept considerably.
- Alternative accounts to CP; Researchers such as Dominic W. Massaro have pointed out for years that researchers have failed to consider alternative mathematical models that can account for categorical perception. The research in this area has consistently shown predicted discrimination based on identification nearly always underestimates observed discrimination. Massaro has shown that models of continuous perception predict observed discrimination better relative to categorical models when the root mean-squared deviation (RMSD) between observed and predicted values is used as a goodness-of-fit metric. Massaro has argued perception is essentially continuous - the perceptual system can discriminate within category - but the nature of the task participants have been given forces a categorical response. I think including this is important in an encyclopedia article of CP.
—The preceding unsigned comment was added by SdlV (talk • contribs) 23:24, 23 June 2006 (UTC)
