The neural correlates underlying lexically-guided perceptual learning

Conference Paper (2019)
Author(s)

O.E. Scharenborg (TU Delft - Multimedia Computing)

Jiska Koemans (Radboud Universiteit Nijmegen)

Cybelle Smith (University of Illinois at Urbana Champaign)

Mark Hasegawa-Johnson (University of Illinois at Urbana Champaign)

Kara D. Federmeier (University of Illinois at Urbana Champaign)

Multimedia Computing
Copyright
© 2019 O.E. Scharenborg, Jiska Koemans, Cybelle Smith, Mark Hasegawa-Johnson, Kara D. Federmeier
DOI related publication
https://doi.org/10.21437/Interspeech.2019-2328
More Info
expand_more
Publication Year
2019
Language
English
Copyright
© 2019 O.E. Scharenborg, Jiska Koemans, Cybelle Smith, Mark Hasegawa-Johnson, Kara D. Federmeier
Multimedia Computing
Pages (from-to)
1223-1227
Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Abstract

There is ample evidence showing that listeners are able to quickly adapt their phoneme classes to ambiguous sounds using a process called lexically-guided perceptual learning. This paper presents the first attempt to examine the neural correlates underlying this process. Specifically, we compared the brain’s responses to ambiguous [f/s] sounds in Dutch non-native listeners of English (N=36) before and after exposure to the ambiguous sound to induce learning, using Event-Related Potentials (ERPs). We identified a group of participants who showed lexically-guided perceptual learning in their phonetic categorization behavior as observed by a significant difference in /s/ responses between pretest and posttest and a group who did not. Moreover, we observed differences in mean ERP amplitude to ambiguous phonemes at pretest and posttest, shown by a reliable reduction in amplitude of a positivity over medial central channels from 250 to 550 ms. However, we observed no significant correlation between the size of behavioral and neural pre/posttest effects. Possibly, the observed behavioral and ERP differences between pretest and posttest link to different aspects of the sound classification task. In follow-up research, these differences will be further investigated by assessing their relationship to neural responses to the ambiguous sounds in the exposure phase.

Files

2328.pdf
(pdf | 0.59 Mb)
License info not available