title: Recalibration of phonetic categories by lipread speech: measuring aftereffects after a 24-hour delay.
abstract: Listeners hearing an ambiguous speech sound flexibly adjust their phonetic categories in accordance with lipread information telling what the phoneme should be (recalibration). Here, we tested the stability of lipread-induced recalibration over time. Listeners were exposed to an ambiguous sound halfway between /t/ and /p/ that was dubbed onto a face articulating either /t/ or /p/. When tested immediately, listeners exposed to lipread /t/ were more likely to categorize the ambiguous sound as /t/ than listeners exposed to /p/. This aftereffect dissipated quickly with prolonged testing and did not reappear after a 24-hour delay. Recalibration of phonetic categories is thus a fragile phenomenon.
authors.affiliation: Tilburg University, Dept. of Psychology, Tilburg, The Netherlands. j.vroomen@uvt.nl
authors.forename: Jean
authors.initials: J
authors.lastname: Vroomen
authors.forename: Martijn
authors.initials: M
authors.lastname: Baart
mesh_terms: D000293:Adolescent; D000328:Adult; D000704:Analysis of Variance; D006801:Humans; D008085:Lipreading; D010700:Phonetics; D011578:Psycholinguistics; D013060:Speech; D013067:Speech Perception; D013997:Time Factors; D055815:Young Adult