Speech production accuracy in children with Down syndrome: relationships with hearing, language, and reading ability and change in speech production accuracy over time.
Speech sounds in Down syndrome stay stuck unless you teach them, and success hinges on vocabulary and reading skill.
01Research in Context
What this study did
Redquest et al. (2021) tracked speech production accuracy in children with Down syndrome for 21 months. They tested how well the kids said sounds and looked at links to hearing, vocabulary, and reading.
What they found
Speech accuracy stayed flat. It did not get better with age. Better talkers had stronger receptive vocabulary, phoneme blending, and word reading skills.
How this fits with other research
Wishart (1993) saw the same stall. That team followed kids from birth to 11 years and found skills can even slip away. The new data fit the old picture: no natural gain.
English et al. (1995) seems to disagree. They saw receptive language drop in adults while expressive skills held steady. The gap is age. Kids plateau; adults may lose ground. Same syndrome, different life stage.
Iacono et al. (2010) extended the timeline. In adults, expressive language and short-term memory declined once Alzheimer status was removed. Together the studies draw a curve: flat in childhood, possible fall later.
Why it matters
Do not wait for speech to improve on its own. Target vocabulary, phoneme blending, and reading in every session. Use strengths like imitation from Amore et al. (2011) to boost the weak speech output the 2021 paper flags.
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02At a glance
03Original abstract
BACKGROUND: This study examines speech production accuracy in children with Down syndrome and concurrent relationships with hearing, language and reading ability. It also examines change in speech production accuracy over a 21-month period. METHODS: A group of 50 children with Down syndrome (aged 5-10 years) completed measures of speech accuracy, non-verbal IQ, reading (single-word reading, letter-sound knowledge and phoneme blending) and language (expressive and receptive vocabulary and receptive grammar). Hearing was assessed by parental report. Speech accuracy was reassessed 21 months later. RESULTS: Although there was considerable variability in the sample, speech was characterised by high levels of errors. There were no effects of gender, hearing status or non-verbal IQ on speech production accuracy. In contrast, speech production accuracy was significantly related to age and to measures of receptive vocabulary, phoneme blending and word reading. There was no significant improvement in speech production accuracy over time. CONCLUSIONS: Children with Down syndrome experience difficulties producing accurate sounds in speech. These difficulties are related to age and to vocabulary and reading skills and persist over time, highlighting the need for intensive targeted speech intervention in this group of children.
Journal of intellectual disability research : JIDR, 2021 · doi:10.1111/jir.12890