Authors:

Niah Nieuwenhuis

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About Paper:

Children with speech sound disorders (SSD) struggle to produce and perceive speech due to various causes (motor planning, articulation, speech perception, etc.), but a large subgroup of children are diagnosed with a phonological disorder. The ability to manipulate and process sounds of a language is called phonological processing. Lexical variability is measured across multiple repetitions of the same word and is thought to reflect the instability of a child's phonological representations for words (Macrae et al., 2014). However, lexical variability occurs in both typically developing (TD) children and children with SSD (Sosa & Stoel-Gammon, 2006, 2012). Previous research also indicates that speech error types may account for differences in phonological processing skills; namely, omissions and atypical speech errors have been identified as indicators of poor phonological awareness (Brosseau-Lapre? & Roepke, 2019). To investigate the relationship between speech production variability and phonological processing, we measured segmental variability, lexical variability, types of speech errors, and speech perception in children with TD and with SSD. Twenty-four 4- and 5-year-olds, 12 with TD and 12 with a phonological SSD, were included in the study. Participants completed a battery of speech, language, oral-motor and phonological awareness tests, a speech perception task, and the Word Inconsistency subtest of the Diagnostic Evaluation of Articulation and Phonology Test. Results indicate that after accounting for receptive vocabulary, segmental variability explains the most variance in phonological processing. Our results offer insight as to why children with SSD are variable in their speech production and how this differs from TD children. Keywords: Speech Production; Speech Perception; Variability; Phonological Awareness

Source:

Purdue University / 2024

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Co-authors:

Niah Nieuwenhuis