13 Categorical Perception - 1 Categorical Perception 2...

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11/22/2016 1 Categorical Perception Lecture Outline Introduction to CP Discriminability Separability / Integrality CP in Hearing Speech stimuli CP in Vision Effect of Names My dissertation! Intro to CP Often, there is a non-linear relationship between stimulus and percept Ex: Response expansion/compression Expansion and Compression Intro to CP Ability to discriminate affected by perceived similarity Intensity Sensitivity and discrimination More sensitivity = less difference needed More discrimination Less sensitivity = more difference needed 1 2 3 4 5 6 7 8
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11/22/2016 2 Less discrimination Intro to CP Different objects are different Intensity Color Roundness Curviness Etc. Many dimensions of difference Some are more important to you Some you can perceive Some you cannot (or don’t) Results in non-continuous perception of the world Intro to CP Perceptually separable Perceived changes in one dimension DO NOT depend on changes in other dimensions Independent Detectable Perceptually integral Perceived changes in one dimension depend on changes in other dimensions Dependent Not (easily) detectable Categorical Perception Physically similar (but not identical) stimuli are perceived as being identical, or more similar than they are. Hierarchy Categorical Perception CP is useful Small differences between objects are not important Can apply experience with objects to classify some new object Can perceive the same object under different conditions 9 10 11 12 13
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11/22/2016 3 Categorical Perception CP is not quite the perception of these colors As these colors Categorical Perception It is like perceiving this color As similar enough to one of these colors so as to give it the same name BUT, doing that makes you see the above colors differently!
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