Affiliation:
1. Marquette University, Milwaukee, WI
2. MGH Institute of Health Professions, Boston, MA
Abstract
Purpose
The current research sought to determine (a) if speech inconsistency is a core feature of childhood apraxia of speech (CAS) or if it is driven by comorbid language impairment that affects a large subset of children with CAS and (b) if speech inconsistency is a sensitive and specific diagnostic marker that can differentiate between CAS and speech delay.
Method
Participants included 48 children ranging between 4;7 to 17;8 (years;months) with CAS (
n
= 10), CAS + language impairment (
n
= 10), speech delay (
n
= 10), language impairment (
n
= 9), or typical development (
n
= 9). Speech inconsistency was assessed at phonemic and token-to-token levels using a variety of stimuli.
Results
Children with CAS and CAS + language impairment performed equivalently on all inconsistency assessments. Children with language impairment evidenced high levels of speech inconsistency on the phrase “buy Bobby a puppy.” Token-to-token inconsistency of monosyllabic words and the phrase “buy Bobby a puppy” was sensitive and specific in differentiating children with CAS and speech delay, whereas inconsistency calculated on other stimuli (e.g., multisyllabic words) was less efficacious in differentiating between these disorders.
Conclusions
Speech inconsistency is a core feature of CAS and is efficacious in differentiating between children with CAS and speech delay; however, sensitivity and specificity are stimuli dependent.
Publisher
American Speech Language Hearing Association
Subject
Speech and Hearing,Linguistics and Language,Language and Linguistics
Reference113 articles.
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3. American Speech-Language-Hearing Association. (2007). Childhood apraxia of speech [Position Statement]
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4. The Mirror System Hypothesis on the linkage of action and languages
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