Not only motor skill performance but also haptic function is impaired in children with developmental language disorder.
Kids with DLD have duller touch and slower hands, so screen both senses and fine-motor skills, not just language.
01Research in Context
What this study did
Yu-Chan et al. (2023) compared kids with developmental language disorder (DLD) to typically-developing peers. They tested two things: how well each child could feel small bumps and edges (haptic sense) and how fast they could move beads and pegs (fine-motor skill).
The team used simple lab tools: a grating dome for touch and a pegboard for speed. Every child did the same short tasks while the researchers timed and scored the results.
What they found
Kids with DLD needed bigger bumps before they could feel them and took longer to move the pegs. Poor touch sense went hand-in-hand with poor hand dexterity.
The study shows DLD is not just a talking problem; it is also a touching and moving problem.
How this fits with other research
Scior et al. (2023) found the opposite link in autism: better fine-motor skill predicted clearer speech and longer sentences. Both papers say motor and language travel together, but the direction of the link flips across diagnoses.
O'Riordan et al. (2006) saw no tactile discrimination problems in autistic kids, while Yu-Ting now shows clear haptic deficits in DLD. The two studies sit side-by-side: autism keeps normal touch, DLD loses it.
Cheng et al. (2011) showed that motor delay hurts writing in coordination disorder. Yu-Ting extends that idea: even when the label is DLD, weak hands still matter for school tools.
Why it matters
If you work with a child who has DLD, add quick touch and fine-motor probes to your intake. A pegboard or bead-thread timed trial takes two minutes and can flag hidden issues that slow handwriting or tool use. Pair language goals with hand-strength or tactile games; the same session can hit both domains. Share the sensory-motor data with OT and teachers so everyone sees the whole child, not just the talking part.
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02At a glance
03Original abstract
BACKGROUND: Previous studies have found an association between motor immaturity and developmental language impairment in children. However, systematic investigations of somatosensory dysfunctions that might be linked to motor deficits in children with developmental language disorder (DLD) are lacking. AIMS: Examined haptic perception and motor skills in school-age children with DLD and typically-developing (TD) children. METHODS: Sixteen children with DLD and sixteen age-matched TD children performed a curvature detection task measuring haptic sensitivity and a curvature discrimination task measuring haptic acuity. The Movement Assessment Battery for Children, 2nd edition (MABC-2) was also conducted to evaluate children's motor ability. RESULTS: The results revealed elevated thresholds of both haptic detection (67.5%) and haptic discrimination (67.9%) in the DLD group when compared to the TD group. In addition, the children with DLD performed significantly less well on the manual dexterity of MABC-2. Finally, a lower haptic acuity was associated with poorer manual dexterity scores of MABC-2. CONCLUSIONS: This study demonstrates for the first time that not only motor skills, but also haptic function is altered in children with DLD. The observed association between manual dexterity and haptic acuity suggests a close relationship between haptic and motor skills in school-age children.
Research in developmental disabilities, 2023 · doi:10.1016/j.ridd.2022.104412