Executive and visuo-motor function in adolescents and adults with autism spectrum disorder.
High-functioning ASD clients show intact planning and simple speed yet slower visuo-motor choices and weaker spatial memory.
01Research in Context
What this study did
Davidovitch et al. (2013) tested teens and adults with high-functioning autism. They wanted to know which thinking and movement skills were strong and which were weak.
The team used paper puzzles, computer games, and finger-tapping tasks. They compared scores to people without autism of the same age and IQ.
What they found
Planning, flexibility, and simple hand speed looked fine. Spatial working memory was weaker. Choice tasks that mixed seeing and moving were slower.
In short, the problems were narrow, not across the board.
How this fits with other research
Touchette et al. (1985) saw the same pattern early: visual brain waves stayed fairly normal while auditory ones did not. The new data show the visuo-motor gap lasts into adulthood.
Kushki et al. (2011) blamed poor handwriting in kids on visuo-motor trouble. Michael’s group now proves the trouble is still there in older clients, so the skill gap does not fade with age.
Walley et al. (2005) found idea-generation deficits in autistic children. Michael’s adults had no such planning deficit. Together the papers map a timeline: generativity problems may ease while visuo-motor lag remains.
Why it matters
When you ask a high-functioning client to pick the right card or copy a shape, give them a touch more time. Do not assume slow means inattentive; the visuo-motor lane is simply a bit longer. Target spatial memory games if you want to shore up a clear weak spot, but leave planning and flexibility tasks alone—they are already intact.
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02At a glance
03Original abstract
This study broadly examines executive (EF) and visuo-motor function in 30 adolescent and adult individuals with high-functioning autism spectrum disorder (ASD) in comparison to 28 controls matched for age, gender, and IQ. ASD individuals showed impaired spatial working memory, whereas planning, cognitive flexibility, and inhibition were spared. Pure movement execution during visuo-motor information processing also was intact. In contrast, execution time of reading, naming, and of visuo-motor information processing tasks including a choice component was increased in the ASD group. Results of this study are in line with previous studies reporting only minimal EF difficulties in older individuals with ASD when assessed by computerized tasks. The finding of impaired visuo-motor information processing should be accounted for in further neuropsychological studies in ASD.
Journal of autism and developmental disorders, 2013 · doi:10.1007/s10803-012-1668-8