A measurement theory of illusory conjunctions |
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Authors: | Prinzmetal William Ivry Richard B Beck Diane Shimizu Naomi |
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Affiliation: | Department of Psychology, University of Califomia, Berkeley 94720-1650, USA. wprinz@socrates.berkeley.edu |
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Abstract: | Illusory conjunctions refer to the incorrect perceptual combination of correctly perceived features, such as color and shape. Research on the phenomenon has been hampered by the lack of a measurement theory that accounts for guessing features, as well as the incorrect combination of correctly perceived features. Recently, several investigators have suggested using multinomial models as a tool for measuring feature integration. The authors examined the adequacy of these models in 2 experiments by testing whether model parameters reflect changes in stimulus factors. In a third experiment, confidence ratings were used as a tool for testing the model. Multinomial models accurately reflected both variations in stimulus factors and observers' trial-by-trial confidence ratings. |
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