Lexically-mediated compensation for coarticulation in older adults

S Luthra, G Peraza-Santiago, D Saltzman… - Proceedings of the …, 2021 - escholarship.org
Proceedings of the Annual Meeting of the Cognitive Science Society, 2021escholarship.org
The claim that contextual knowledge exerts a top-down influence on sensory processing is
supported by evidence for lexically-mediated compensation for coarticulation (LCfC) in
spoken language processing. In this phenomenon, a lexically restored context phoneme
(eg, the final phoneme in Christma# or fooli#) influences perception of a subsequent target
phoneme (eg, a phoneme ambiguous between/t/and/k/). A recent report shows that carefully
vetted materials produce robust, replicable LCfC effects in younger adults (18-34 years old) …
The claim that contextual knowledge exerts a top-down influence on sensory processing is supported by evidence for lexically-mediated compensation for coarticulation (LCfC) in spoken language processing. In this phenomenon, a lexically restored context phoneme (e.g., the final phoneme in Christma# or fooli#) influences perception of a subsequent target phoneme (e.g., a phoneme ambiguous between /t/ and /k/). A recent report shows that carefully vetted materials produce robust, replicable LCfC effects in younger adults (18-34 years old). Here, we asked whether we would observe LCfC in a sample of older adults (aged 60+). This is of interest because older adults must often contend with age-related declines in sensory processing, with previous research suggesting that older adults may compensate for age-related changes by relying more strongly on contextual knowledge. We observed robust LCfC effects in younger and older samples, with no significant difference in the effect size between age groups.
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