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auditory - Auditory perception(notes on [email protected] Newborn...

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Auditory perception (notes on [email protected])
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Newborn hearing is ~ adultlike
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IDS
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Why IDS?
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Building blocks of speech perception Phonemes : “letters” of speech [b], [g], [k], [i], [u] ?? Do we perceive speech in a special way? (differently from colors, music, faces, etc.) ?? Is speech perception innate?
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Categorical Perception (CP) The perception of a continuum in terms of categories . A perceptual illusion
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Illustration of CP CP divides stimulus into categories: Continuous variation of stimulus
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Two Effects of CP Reality: Continuous variation of stimulus All differences equally perceptible
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Two Effects of CP Categorical perception: All differences equally perceptible 1. Good between-category discrimination 2. Poor within-category discrimination Reality : Continuous variation of stimulus
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What is CP Good For? • Good discrimination between categories, e.g. [b], [d], [g] • Ignore uninformative variation within a category
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Example: Voice Onset Time (VOT) /pa/ vs. /ba/ /ta/ vs. /da/ Continuous range of VOT Categorical perception of signal Short VOT………………… .... Long VOT --------Voiced-------|------Voiceless------ /ba/ /pa/
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