Do vowel error patterns distinguish the speech of typically developing children to children with a phonological disorder or children with suspected Childhood Apraxia of Speech? A comparison of vowel errors produced by typically developing children, children with a phonological disorder and children with suspected apraxia of speech
Citation
(2016) Do vowel error patterns distinguish the speech of typically
developing children to children with a phonological disorder or
children with suspected Childhood Apraxia of Speech? A
comparison of vowel errors produced by typically developing
children, children with a phonological disorder and children
with suspected apraxia of speech, no. 65.
Abstract
This research project takes the format of an extended research proposal designed to
examine the validity of using vowel error patterns to support a differential diagnosis between
typically developing children (TD), children with a phonological disorder (PD) and children
with suspected Childhood Apraxia of Speech (sCAS). It proposes a cross-sectional empirical
study comparing the vowel errors produced by two client groups: (i) children with a
phonological disorder and (ii) children with suspected Childhood Apraxia of speech and
compares them to the control group of typically developing children. Both the type and extent
of error patterns and the consistency of production will be examined.
Previous studies have examined the vowel errors of typical and clinical children and
employed a range of methods of data collection, analysis and study designs, including single
case studies, case series or single case groups. Despite this, there is, to the author's
knowledge, no other study which directly compares the vowel productions of TD children to
these two client groups using the same methodology. Given the claims in the literature that
vowel errors might be a useful diagnostic feature - with more extensive errors, 'vowel
distortions' and variable vowel patterns associated with sCAS - it is clear that the literature,
and hence clinical diagnosis and decision making, would benefit from an empirical account
of the extent and universality of any distinction between the groups.
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