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Linguistic categories and speech perception

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3 ways discrete linguistic-phonetic<br />

<strong>categories</strong> might be perceived<br />

1. they are really there in the acoustic signal<br />

acoustic invariance (or reliability)<br />

2. they result from the way the auditory system<br />

processes sound<br />

auditory invariance (or reliability)<br />

3. they result from the way the brain processes<br />

any sort of information, sensory or not<br />

‘cognitive invariance’

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