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Phonological discrimination and contrast detection in pupillometry
Oticon AS, Denmark; Univ Oslo, Norway.
Oticon Med, Denmark.
Linköping University, Department of Behavioural Sciences and Learning, Disability Research Division. Linköping University, Faculty of Arts and Sciences. Linköping University, The Swedish Institute for Disability Research. Oticon AS, Denmark. (Linnaeus Centre HEAD)ORCID iD: 0000-0002-7693-1122
Oticon AS, Denmark.
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2023 (English)In: Frontiers in Psychology, E-ISSN 1664-1078, Vol. 14, article id 1232262Article in journal (Refereed) Published
Abstract [en]

IntroductionThe perception of phonemes is guided by both low-level acoustic cues and high-level linguistic context. However, differentiating between these two types of processing can be challenging. In this study, we explore the utility of pupillometry as a tool to investigate both low- and high-level processing of phonological stimuli, with a particular focus on its ability to capture novelty detection and cognitive processing during speech perception.MethodsPupillometric traces were recorded from a sample of 22 Danish-speaking adults, with self-reported normal hearing, while performing two phonological-contrast perception tasks: a nonword discrimination task, which included minimal-pair combinations specific to the Danish language, and a nonword detection task involving the detection of phonologically modified words within sentences. The study explored the perception of contrasts in both unprocessed speech and degraded speech input, processed with a vocoder.ResultsNo difference in peak pupil dilation was observed when the contrast occurred between two isolated nonwords in the nonword discrimination task. For unprocessed speech, higher peak pupil dilations were measured when phonologically modified words were detected within a sentence compared to sentences without the nonwords. For vocoded speech, higher peak pupil dilation was observed for sentence stimuli, but not for the isolated nonwords, although performance decreased similarly for both tasks.ConclusionOur findings demonstrate the complexity of pupil dynamics in the presence of acoustic and phonological manipulation. Pupil responses seemed to reflect higher-level cognitive and lexical processing related to phonological perception rather than low-level perception of acoustic cues. However, the incorporation of multiple talkers in the stimuli, coupled with the relatively low task complexity, may have affected the pupil dilation.

Place, publisher, year, edition, pages
FRONTIERS MEDIA SA , 2023. Vol. 14, article id 1232262
Keywords [en]
pupillometry; speech perception; phoneme perception; acoustic cues; novelty detection; linguistic context
National Category
General Language Studies and Linguistics
Identifiers
URN: urn:nbn:se:liu:diva-199448DOI: 10.3389/fpsyg.2023.1232262ISI: 001101692200001PubMedID: 38023001OAI: oai:DiVA.org:liu-199448DiVA, id: diva2:1817035
Note

Funding Agencies|The project from which this study originated has received funding from the European Unions Horizon 2020 research and innovation program under the Marie Sklodowska-Curie Grant Agreement n. 860755. [860755]; European Union

Available from: 2023-12-05 Created: 2023-12-05 Last updated: 2023-12-05

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Ng, Elaine Hoi Ning
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Disability Research DivisionFaculty of Arts and SciencesThe Swedish Institute for Disability Research
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