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Perceptual learning of noise vocoded words: Effects of feedback and lexicality

Davis, Matthew H.
Johnsrude, Ingrid S.
Carlyon, Robert P.
Published in Journal of Experimental Psychology: Human Perception and Performance. 2008, vol. 34, no. 2, p. 460-474
Abstract Speech comprehension is resistant to acoustic distortion in the input, reflecting listeners' ability to adjust perceptual processes to match the speech input. This adjustment is reflected in improved comprehension of distorted speech with experience. For noise vocoding, a manipulation that removes spectral detail from speech, listeners' word report showed a significantly greater improvement over trials for listeners that heard clear speech presentations before rather than after hearing distorted speech (clear-then-distorted compared with distorted-then-clear feedback, in Experiment 1). This perceptual learning generalized to untrained words suggesting a sublexical locus for learning and was equivalent for word and nonword training stimuli (Experiment 2). These findings point to the crucial involvement of phonological short-term memory and top-down processes in the perceptual learning of noise-vocoded speech. Similar processes may facilitate comprehension of speech in an unfamiliar accent or following cochlear implantation.
Keywords SpeechPerceptionAdaptationVocoding
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Article (Published version) (148 Kb) - public document Free access
Research group Brain and Language Lab
Autre: U.K. Medical Research Council
Autre: Canadian Institute for Health Research
(ISO format)
HERVAIS-ADELMAN, Alexis et al. Perceptual learning of noise vocoded words: Effects of feedback and lexicality. In: Journal of Experimental Psychology: Human Perception and Performance, 2008, vol. 34, n° 2, p. 460-474. doi: 10.1037/0096-1523.34.2.460

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Deposited on : 2013-06-18

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