Probing the Underlying Mechanisms of Spectro-Temporal Modulation Discrimination.
Speech perception relies critically on the processing of spectro-temporal modulations (STMs), yet the mechanisms supporting STM perception and their role in explaining individual variability remain incompletely understood. This study employed a reverse-correlation paradigm, previously used for STM d...
| Publicado en: | Trends in Hearing Vol. 30; pp. 1 - 23 |
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| Autores principales: | , , , , |
| Formato: | equations & formulas pictorial research tables/charts Journal Article |
| Publicado: |
Sage Publications Inc.
7/1/2026
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=195035356&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 195035356 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 23312165 HCEJ jtl: Trends in Hearing issn: 23312165 maglogo: N pubinfo: dt: 7/1/2026 vid: 30 pid: 344 pub: Sage Publications Inc. place: Thousand Oaks, California artinfo: ui: 195035356 195035356 195035356 10.1177/23312165261465060 195035356 ppf: 1 ppct: 22 formats: tig: atl: Probing the Underlying Mechanisms of Spectro-Temporal Modulation Discrimination. aug: au: Paulick, Lily Cassandra López-Ramos, David Varnet, Léo Neri, Peter Ponsot, Emmanuel affil: Hearing Systems, Department of Health Technology, Technical University of Denmark, Kongens Lyngby, Denmark sug: subj: Speech Perception Evaluation Psychoacoustics Task Performance and Analysis Human Funding Source Listening Adult Male Female After Care Noise Evaluation Correlational Studies Post Hoc Analysis Wilcoxon Rank Sum Test Friedman Test Wilcoxon Signed Rank Test Calibration Data Analysis Software Auditory Threshold Evaluation Paradigms Decision Making Experimental Studies Adult: 19-44 years Male Female ab: Speech perception relies critically on the processing of spectro-temporal modulations (STMs), yet the mechanisms supporting STM perception and their role in explaining individual variability remain incompletely understood. This study employed a reverse-correlation paradigm, previously used for STM detection, to investigate how listeners discriminate between upward- and downward-moving STMs of identical temporal and spectral rates. Normal-hearing participants completed the task under three surround conditions: (i) no surround sound, (ii) surround sound consisting of the upward-moving STM and (iii) surround sound consisting of the downward-moving STM. Each stimulus was perturbed with structured spectro-temporal noise, from which perceptual kernels were derived. The data showed that listeners primarily weighted upward-moving targets, showing limited evidence of simultaneous monitoring of both directions. Sensitivity was selectively reduced in the downward-moving surround condition, suggesting orientation-specific interference. Simulations with a modulation filterbank model under different configurations, as well as behavioural performance differences across different experimental conditions, further supported the conclusion that participants relied predominantly on upward-target templates, with phase sensitivity additionally playing a critical role in replicating behavioural patterns. Nonetheless, substantial variability was observed in individual perceptual kernels that could not be captured by the model in its normal-hearing configuration. Overall, the results provide new insights into the mechanisms of STM discrimination and demonstrate the utility of reverse-correlation approaches for evaluating auditory models and probing perceptual decision strategies. pubtype: Academic Journal doctype: equations & formulas pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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