First Advisor

Carolyn Quam

Term of Graduation

Summer 2020

Date of Publication

10-1-2020

Document Type

Thesis

Degree Name

Master of Science (M.S.) in Speech and Hearing Sciences

Department

Speech and Hearing Sciences

Language

English

DOI

10.15760/etd.7460

Physical Description

1 online resource (viii, 64 pages)

Abstract

The current study examined implicit sound- and visual-meaning-mappings of children with and without Developmental Language Disorder (DLD).

One child with DLD and 29 children with typical language development (TLD) were included in the study, based on results from a hearing screening and standardized assessments of cognitive and expressive language skills. Participants completed two computer-based experiments, which were designed to investigate: 1) sound discrimination (pitch and duration), implicit mapping of sound stimuli to objects; 2) visual discrimination, implicit mapping of visual stimuli to objects.

The current study showed that children with TLD who implicitly learned pitch categories showed better mapping of sound stimuli to objects than children with TLD who implicitly learned duration categories. The one child with DLD who learned pitch categories showed implicit learning in the mapping task. The child also showed implicit learning of visual stimuli in the visual experiment. An association between sound-discrimination scores and sound mapping performance in multivariate analyses of covariance (MANCOVAs) was not found in the TLD group. An interaction between visual discrimination and phase in the test block was found. Correlation tests revealed a negligibly positive association between visual discrimination and visual learning of the second phase in the test block in the TLD group, suggesting that links were starting to appear as children learned the categories.

Findings are discussed in the context of recruitment challenges, and potential experimental design adjustments are suggested for future work.

Rights

In Copyright. URI: http://rightsstatements.org/vocab/InC/1.0/ This Item is protected by copyright and/or related rights. You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s).

Persistent Identifier

https://archives.pdx.edu/ds/psu/34138

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