Abstract
Online auditory feedback (OAF) perturbations have reviewed much about the interplay between acoustic and sensorimotor information during speech production. For spectral manipulations (e.g., formant frequencies), it was shown that people are sensitive to OAF, mainly reacting with a compensation in the opposite direction to the perturbation. This study investigates German speakers’ reaction not to spectral but temporal OAF manipulations for the vowels /a/ and /a:/, a phoneme contrast that is realized as a quantity contrast without strong additional spectral cues. Participants were asked to produce the German words Stab (/ʃtaːp/ “pole”) and Staat (/ʃtaːt/ “state”) where the vowel was compressed in real-time, or Stamm (/ʃtam/ “trunk”) and Stadt (/ʃtat/ “city”) where the vowel was lengthened. While Staat and Stadt form a minimal pair in German, Stamm and Stab do not have lexical neighbours. Results showed compensatory responses in the opposite direction to the manipulation for Staat, Stab and Stamm with larger effects for Staat (with the lexical neighbour) than Stab (without lexical neighbour). Thus, participants react to manipulations of temporal feedback in a similar manner to spectral perturbations. These findings give more precise insight into the link between perception and production in the online-processing of the temporal structure of speech.
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