PS262 Chapter Notes - Chapter 13: Vocal Tract, Vocal Folds, Voice-Onset Time
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Categorical perception: occurs when stimuli that exist along a continuum are perceived as divided into discrete categories, e. g. , consider the visible spectrum starting on the left, at a wavelength of 450 nm, we see blue. As we move toward longer wavelengths, the colour remains blue, until suddenly at about 480 nm, we perceive green. Moving along the continuum, we see green all the way to about 570 nm, when the colour changes to yellow, then orange, then red. If this constancy did not exist, we would perceive different sounds every time we changed the vot. Instead, we experience one sound on each side of the phonetic boundary. This simplifies our perception of phonemes and helps us more easily perceive the wide variety of sounds in our environment. Link between vision and speech has been shown to have a physiological basis. Link between speech perception and face perception was demonstrated in another way by.
