Crossmodal synesthetic congruency improves visual timing in dyslexic children.
Matching pitch to visual size gives dyslexic children a small but real boost in timing accuracy.
01Research in Context
What this study did
Chen et al. (2016) asked dyslexic children to judge when a small shape flashed on a screen. A short beep played at the same time. The pitch of the beep matched the size of the shape in a natural way: big shape got a low note, small shape got a high note.
The team compared the kids with dyslexia to same-age peers without reading problems. They wanted to know if the matching sound would help the dyslexic group time the flashes more accurately.
What they found
The dyslexic children still made timing errors, but the errors got smaller when the pitch matched the size. The benefit was modest, yet it was larger than the tiny gain seen in typical readers.
In plain words, the congruent sound gave the dyslexic brain an extra cue that partly patched the visual timing gap.
How this fits with other research
Virlet et al. (2024) extends this idea. They added proprioceptive training—prism glasses, balance pads, and breathing games—to speech therapy. After nine months, dyslexic children read faster and their eye movements looked normal. Both studies show that tacking on a non-reading sense can lift reading skills.
Coetzee et al. (2013) used a different delay—developmental coordination disorder—but the pattern is similar. An 18-week visual-therapy block fixed eye-tracking problems in 7- to 8-year-olds. Lihan’s shorter, lab-only task fits the same theme: train the eyes through another channel.
Jachyra et al. (2021) and Kleberg et al. (2017) show the trick works in autism too. A quick beep right before a visual task sped up attention and memory in autistic children. The cue does not need to be complex; it just needs to be salient.
Why it matters
You already use multisensory drills—tiles, tapping, colored letters. Add one more layer: pair visual size with pitch. Before a flash-card round, set a rule: big card = low chime, small card = high chime. It takes seconds, costs nothing, and may sharpen the child’s timing for the next task. Watch the data; if timing improves, keep the sound. If not, drop it and move on.
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02At a glance
03Original abstract
Consistent with the temporal ventriloquism effect, synesthetic correspondence between the features of visual size and auditory pitch has been shown to modulate the performance of visual temporal order judgment (TOJ) in typical adults. Here in the two main experiments we recruited seventeen dyslexic children and twenty typically developing children to perform a visual TOJ task and measured their ability of synesthetic correspondence between visual size and auditory pitch. In Experiment 1, participants were shown two consecutively presented visual discs that were temporally flanked by two synesthetic congruent or incongruent auditory beeps. In Experiment 2, participants received a crossmodal matching test (visual-size vs. auditory pitch). The results showed that compared to the typically developing group, dyslexic children benefited more from cross-modal synesthetic correspondence to partially compensate for their deficiency in visual TOJ task. The multisensory facilitation for timing performance was correlated with reading ability (Exp.1). Moreover, dyslexic children formed intact "congruent" matching of visually larger shapes to lower auditory pitch, and visually smaller shapes to higher auditory pitch, as did their typically developing peers (Exp 2). The results of our present study suggested general deficits of temporal processing in dyslexic children, However, with relatively intact ability of auditory pitch-visual size matching, dyslexic children could separate visual events using auditory cues. The current study also indicates a feasible way to improve the reading ability by exploiting temporal ventriloquism effect, modulated by appropriate crossmodal synesthetic associations.
Research in developmental disabilities, 2016 · doi:10.1016/j.ridd.2016.03.010