Interpersonal motor coordination during joint actions in children with and without autism spectrum disorder: The role of motor information.
Kids with ASD need more than a partner's moving arm to stay in sync—give them clear visual goals and extra timing prompts.
01Research in Context
What this study did
Fulceri et al. (2018) watched kids with and without autism move together on a simple joint task. The team turned off all extra cues; only the partner's moving arm gave hints about when and where to act.
High-speed cameras captured every tiny motion. The goal: see if autistic children could sync their moves using only these body-speed clues.
What they found
Children with autism moved slower and missed the beat. They needed more time to match the partner's rhythm and never reached the smooth flow seen in typical kids.
When the task rested only on reading body motion, the ASD group showed poorer and slower motor coordination.
How this fits with other research
Fitzpatrick et al. (2017) saw the same shaky timing using a different math lens. Both labs agree: autistic kids struggle to lock into social motor rhythms.
Liu et al. (2021) widened the lens to eye movements. They found gaze-sync delays during joint attention, showing the timing lag spans hands and eyes.
Warreyn et al. (2007) spotted the first clues in preschoolers. Their early joint-attention stumbles foreshadow the later body-coordination gaps Francesca caught on camera.
Why it matters
Your social-skills lesson may fail if it leans on subtle body cues alone. Add clear visual end-points, extra countdowns, or color cues so the child sees both the goal and the timing. When you practice turn-taking or partner games, give explicit motor prompts and pause for longer wait-time. Better cues mean smoother joints actions and less frustration for everyone.
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02At a glance
03Original abstract
BACKGROUND: Kinematics plays a key role in action prediction, imitation and joint action coordination. Despite people with autism spectrum disorder (ASD) show a failure to use kinematic cues during observation and imitation, there is a paucity of studies exploring the role of this dysfunction during joint actions in children with ASD. AIM: To evaluate the interpersonal motor coordination of children with ASD and typically developing (TD) children during a joint action task. METHOD: Twenty-two participants performed two cooperative tasks. In the first one (Clear End-Point), children were provided with a priori information on movement end-point. In the second one (Unclear End-Point), the end-point was unknown and children had to use kinematic cues to accomplish the shared goal. RESULTS: We found no between-group differences in the first task, even if children with ASD displayed greater reaction time variability. In the second task, they showed less accurate and slower movements than TD children. Moreover, their movement features did not differ between the two tasks, whereas TD children showed reduced reaction time variability and number of errors in the second task. CONCLUSION: Children with ASD were impaired in joint action coordination when they had to rely only on kinematic information. They were not able to pay more attention to the kinematic cues in absence of a visual goal.
Research in developmental disabilities, 2018 · doi:10.1016/j.ridd.2018.05.018