Reduced Proactive Control Processes Associated With Behavioral Response Inhibition Deficits in Autism Spectrum Disorder.
Autistic kids struggle to slow down ahead of time, not to stop at the last moment—so give early warning cues, not late stop commands.
01Research in Context
What this study did
Adams et al. (2021) watched how kids with autism moved their eyes. They used a game that asked children to stop a planned eye jump. The task split stopping into two parts: getting ready early (proactive) or slamming the brakes late (reactive).
By tracking eye speed, the team could see who slowed down ahead of time and who could still stop at the last second.
What they found
Kids with autism were worse at stopping their eyes. The trouble came from poor early slowing, not from slow last-second stopping. In plain words, they did not ease off the gas before the red light, but they could still brake hard if told late.
How this fits with other research
Early et al. (2012) once reported that autistic children can stop a hand press just fine. That sounds opposite to the new eye result. The gap closes when you see the tasks: the 2012 study used hand go/no-go that taps quick reactive brakes, while the 2021 eye test caught the early gentle slowdown. Different tools, different control styles.
Eussen et al. (2016) and Tonizzi et al. (2022) both pooled older studies and found a medium-sized inhibition deficit across many tasks. The eye-movement finding now tells us why the pool is murky: only the proactive, get-ready part is weak; reactive stopping stays intact.
Lindor et al. (2019) adds that the deficit may hit hardest in autistic kids who also have motor struggles. So the proactive slowdown problem could live in a specific subgroup, not every child on the spectrum.
Why it matters
When you teach stop-or-wait skills, give a clear early cue and extra prep time instead of yelling 'stop' at the last second. Build the child's own ready-set routine before the demand. This small shift targets the true weak spot and keeps your session calm and safe.
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02At a glance
03Original abstract
Impairments in inhibitory control are common in individuals with autism spectrum disorder (ASD) and associated with multiple clinical issues. Proactive (i.e., delaying response onset) and reactive control mechanisms (i.e., stopping quickly) contribute to successful inhibitory control in typically developing individuals and may be compromised in ASD. We assessed inhibitory control in 58 individuals with ASD and 63 typically developing controls aged 5-29 years using an oculomotor stop-signal task during which participants made rapid eye movements (i.e., saccades) toward peripheral targets (i.e., GO trials) or inhibited saccades (i.e., STOP trials). Individuals with ASD exhibited reduced ability to inhibit saccades, reduced reaction time slowing (GO RT slowing), and faster stop-signal reaction times (SSRT) compared to controls. Across participants, stopping accuracy was positively related to GO RT slowing, and increased age was associated with higher stopping accuracy and GO RT slowing. Our results indicate that failures to proactively delay prepotent responses in ASD underpin deficits of inhibitory control and may contribute to difficulties modifying their behavior according to changes in contextual demands. These findings implicate frontostriatal brain networks in inhibitory control and core symptoms of ASD. LAY SUMMARY: Difficulties stopping actions are common in individuals with autism spectrum disorder (ASD) and are related to repetitive behaviors. This study compared the ability to stop eye movements in individuals with ASD and healthy peers. We found that individuals with ASD were less able to stop eye movements and that this difficulty was related to a reduced ability to delay their eye movements before seeing the cue to stop, not their ability to react quickly to this cue.
Autism research : official journal of the International Society for Autism Research, 2021 · doi:10.1037/a0012726