Procedural learning is impaired in dyslexia: evidence from a meta-analysis of serial reaction time studies.
Across 14 studies, people with dyslexia learn movement sequences about a quarter-step behind peers.
01Research in Context
What this study did
Miltenberger et al. (2013) pooled 14 small studies that used the serial-reaction-time (SRT) game.
In this game people press buttons as lights pop up. The lights follow a hidden pattern.
631 people took part: 285 had dyslexia, 346 were typical readers. Ages ranged from 8 to adult.
What they found
On average, the dyslexia group learned the hidden pattern 0.28 standard deviations slower.
That is a small but real gap. Older kids and longer games made the gap bigger.
Typical readers got faster and made fewer errors; the dyslexia group improved less.
How this fits with other research
Tang et al. (2023) also meta-analyzed dyslexia and found a visual-attention-span deficit. Together the two papers show that dyslexia carries multiple small cognitive glitches, not just phonics trouble.
Micai et al. (2021) saw a similar-size inhibition deficit in Down syndrome. The pattern is clear: many neurodevelopmental labels come with tiny but measurable executive hiccups.
Dowker (2020) reminds us that kids with dyslexia often stumble in arithmetic too. When you see slow math fact fluency, probe whether weak procedural learning is part of the story.
Why it matters
You now have evidence that rote practice may not stick as fast for clients with dyslexia. Break motor or sequencing tasks into shorter blocks and revisit them across days. Add visual cues or errorless drills to shore up the weak implicit learning system.
Want CEUs on This Topic?
The ABA Clubhouse has 60+ free CEUs — live every Wednesday. Ethics, supervision & clinical topics.
Join Free →Cut your chaining steps in half and insert extra practice trials tomorrow.
02At a glance
03Original abstract
A number of studies have investigated procedural learning in dyslexia using serial reaction time (SRT) tasks. Overall, the results have been mixed, with evidence of both impaired and intact learning reported. We undertook a systematic search of studies that examined procedural learning using SRT tasks, and synthesized the data using meta-analysis. A total of 14 studies were identified, representing data from 314 individuals with dyslexia and 317 typically developing control participants. The results indicate that, on average, individuals with dyslexia have worse procedural learning abilities than controls, as indexed by sequence learning on the SRT task. The average weighted standardized mean difference (the effect size) was found to be 0.449 (CI95: .204, .693), and was significant (p<.001). However, moderate levels of heterogeneity were found between study-level effect sizes. Meta-regression analyses indicated that studies with older participants that used SRT tasks with second order conditional sequences, or with older participants that used sequences that were presented a large number of times, were associated with smaller effect sizes. These associations are discussed with respect to compensatory and delayed memory systems in dyslexia.
Research in developmental disabilities, 2013 · doi:10.1016/j.ridd.2013.07.017