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  The effect of speaker variability on phoneme processing: A crowd-science experiment

Govaart, G., Bergmann, C., Friederici, A. D., & Männel, C. (2020). The effect of speaker variability on phoneme processing: A crowd-science experiment. Poster presented at IMPRS Conference 2020: Interdisciplinary Approaches in the Language Sciences, online.

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 Creators:
Govaart, Gisela1, 2, 3, Author           
Bergmann, Christina4, Author
Friederici, Angela D.1, Author           
Männel, Claudia1, 5, Author           
Affiliations:
1Department Neuropsychology, MPI for Human Cognitive and Brain Sciences, Max Planck Society, Leipzig, DE, ou_634551              
2Charité – Universitätsmedizin Berlin, Einstein Center for Neurosciences Berlin, Charitéplatz 1, 10117 Berlin, Germany, ou_persistent22              
3Humboldt-Universität zu Berlin, Faculty of Philosophy, Berlin School of Mind and Brain, Luisenstraße 56, 10117 Berlin, Germany, ou_persistent22              
4Language Development Department, Max Planck Institute for Psycholinguistics, Wundtlaan 1, 6525 XD Nijmegen, The Netherlands, ou_persistent22              
5• Department of Audiology and Phoniatrics, Charité – Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany, ou_persistent22              

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Free keywords: Phoneme discrimination; Speaker variability; Gamification; Online experiment
 Abstract: Listeners can effortlessly understand speech from any speaker, which is remarkable given the enormous acoustic variability and lack of invariant features corresponding to phonemes across speakers. Recently, it has been proposed that listeners use voice information to adapt to speakers (Kleinschmidt & Jaeger, 2015), which would reduce acoustic variability and explain why listeners can understand speech robustly from different speakers. In the current study, we investigate whether adult listeners rely on voice information to adapt to speakers by testing the effect of speaker variability on phoneme processing. Specifically, we will examine whether there is a processing cost for listening to multiple speakers as compared to a single speaker. Given that listeners effortlessly understand different speakers, we will use a crowd-science approach to increase our sample-size to capture potentially subtle effects of speaker variability on phoneme processing. To test phoneme discrimination, we will select two phoneme contrasts that are equally far separated in acoustic space within speakers, but unequally far separated across speakers, by capitalizing on an analysis that quantifies how much influence speaker variability has on acoustic distance between phoneme contrasts in English (Bergmann et al., 2016). We will test the discrimination of these two phoneme contrasts in a single-speaker and a multiple speaker condition, in a web-based XAB discrimination experiment, which we will gamify in order to keep participants’ attention. We will present the experimental design, along with the conceptualization of the game. If listeners adapt to speakers based on voice information, there should be higher processing costs in the multiple-speaker condition, and this processing cost should be highest for the phoneme contrast that is furthest separated in acoustic space across speakers.

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 Dates: 2020-06
 Publication Status: Not specified
 Pages: -
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 Rev. Type: -
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Title: IMPRS Conference 2020: Interdisciplinary Approaches in the Language Sciences
Place of Event: online
Start-/End Date: 2020-06-03 - 2020-06-05
Invited: Yes

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