Visual-motor integration in children with Prader-Willi syndrome.
Visual-motor skills in Prader-Willi syndrome stay stuck at a preschool level—untie the visual step from the motor step to cut frustration.
01Research in Context
What this study did
Alaimo et al. (2015) tracked visual-motor skills in kids with Prader-Willi syndrome. They used the Beery-VMI test twice, two years apart.
The team wanted to know if these skills stay flat or change over time. They also checked if IQ or genetic subtype mattered.
What they found
Scores stayed three standard deviations below average. No growth showed up between test one and test two.
Kids with the deletion type and higher IQ scored slightly better, but still far behind peers.
How this fits with other research
Faso et al. (2016) saw the same flat line in Williams syndrome. Both syndromes lock kids at a preschool visual-motor level even as they age.
Cazalets et al. (2017) found the same link in Rubinstein-Taybi: lower IQ equals weaker visuomotor scores. The pattern repeats across rare genetic disorders.
Davidson et al. (2014) looked at NF1 and tied poor motor timing to low Beery scores. Together these studies say the Beery-VMI is a quick red flag for hidden motor-timing or executive problems.
Why it matters
If you work with PWS, expect drawing, writing, and tool use to stay tough. Skip timed crafts; break tasks into separate look and do steps. Pair visual cues with hand-over-hand guidance and celebrate small gains.
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02At a glance
03Original abstract
BACKGROUND: Prader-Willi syndrome (PWS) is characterised by hypotonia, hypogonadism, short stature, obesity, behavioural problems, intellectual disability, and delay in language, social and motor development. There is very limited knowledge about visual-motor integration in children with PWS. METHOD: Seventy-three children with PWS aged 7-17 years were included. Visual-motor integration was assessed using the Beery Visual-motor Integration test at the start of the study and after 2 years. The association between visual-motor integration and age, gender, genetic subtype and intelligence was assessed. RESULTS: Children with PWS scored 'very low' (-3 standard deviations) in visual-motor integration and 'below average' (-1 standard deviation) in visual perception and motor coordination compared with typically developing children. Visual-motor integration was higher in children with a deletion (β = -0.170, P = 0.037), in older children (β = 0.222, P = 0.009) and in those with a higher total IQ (β = 0.784, P < 0.001). Visual perception was higher with a deletion (β = -0.193, P = 0.044) and higher IQ (β = -0.618, P < 0.001), but motor coordination was only higher with a higher total IQ (β = 0.429, P = 0.001). Visual perception and motor coordination were not associated with age or gender. There was a trend for visual-motor integration decline over the 2 year follow-up period (P = 0.099). Visual perception and motor coordination did not change over the follow-up period. CONCLUSIONS: Visual-motor integration is very poor in children with PWS. Children scored higher on the time-limited subtests for visual perception and motor coordination than the combined test for visual-motor integration. Separation of visual-motor integration tasks into pure visual or motor tasks and allowing sufficient time to perform the tasks might improve daily activities, both at home and at school.
Journal of intellectual disability research : JIDR, 2015 · doi:10.1111/jir.12197