Later learning stages in procedural memory are impaired in children with Specific Language Impairment.
Kids with SLI can copy a new sequence right away but lose it overnight, so you must re-practice the next day.
01Research in Context
What this study did
Desmottes et al. (2016) watched kids with Specific Language Impairment learn a finger-tapping sequence. The kids first practiced the sequence in the lab. The team tested them again one day and one week later.
They wanted to know if the children could keep the new motor skill after sleep and time passed.
What they found
The kids learned the sequence just fine on day one. After one night and again after one week, most of the gain was gone. Their early learning looked normal, but the later storage stage broke down.
How this fits with other research
Durbin et al. (2019) seem to disagree. They showed that kids with Williams syndrome improve on a block-building task after sleep, while kids with Down syndrome do not. The difference is the group: Williams and typically developing kids keep the skill overnight, but Down syndrome and SLI kids do not. The studies do not clash; they just point out which diagnoses benefit from sleep-based practice.
Dispaldro et al. (2015) and Bryłka et al. (2024) back up the idea that SLI memory breaks down when the brain needs to use language-like codes. Marco found visual interference hurts these kids more, and Martyna showed short-term memory drops only when items can be named. Together, the papers paint the same picture: SLI weakens the silent inner speech that usually glues new steps together.
Heaton et al. (2018) add that even musical imagery, another inner-ear skill, is weaker in SLI. The pattern keeps repeating: if the task can be talked through in the mind, kids with SLI lose the advantage overnight.
Why it matters
For BCBAs, the message is simple: do not trust one good session. After you teach a self-care chain, typing routine, or play sequence to a child with SLI, plan quick booster drills the next day and again the next week. Use short, massed trials instead of hoping sleep will finish the job. Keep visuals clean and language light so the fragile inner loop has less to carry.
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02At a glance
03Original abstract
BACKGROUND: According to the Procedural Deficit Hypothesis (PDH), difficulties in the procedural memory system may contribute to the language difficulties encountered by children with Specific Language Impairment (SLI). Most studies investigating the PDH have used the sequence learning paradigm; however these studies have principally focused on initial sequence learning in a single practice session. AIMS: The present study sought to extend these investigations by assessing the consolidation stage and longer-term retention of implicit sequence-specific knowledge in 42 children with or without SLI. METHODS AND PROCEDURES: Both groups of children completed a serial reaction time task and were tested 24h and one week after practice. OUTCOMES AND RESULTS: Results showed that children with SLI succeeded as well as children with typical development (TD) in the early acquisition stage of the sequence learning task. However, as training blocks progressed, only TD children improved their sequence knowledge while children with SLI did not appear to evolve any more. Moreover, children with SLI showed a lack of the consolidation gains in sequence knowledge displayed by the TD children. CONCLUSIONS AND IMPLICATIONS: Overall, these results were in line with the predictions of the PDH and suggest that later learning stages in procedural memory are impaired in SLI.
Research in developmental disabilities, 2016 · doi:10.1016/j.ridd.2015.10.010