Global Motion Perception in Autism Spectrum Disorder: A Meta-Analysis.

The result is a group-level average difference, not a description of any one person's motion perception. Performance varied significantly across and within studies, and individual differences in motion thresholds were large. The analysis excluded social or emotional interpretation tasks, so it does not address interpreting social or emotional content from motion. No tested moderator explained the variation, so the result does not identify who is most affected. The authors note that detecting small effects requires large sample sizes, and they call for avoiding new underpowered studies. The funnel plot showed slight asymmetry, but a rank correlation test did not indicate true publication bias.

Do not treat a global motion deficit as a universal feature of autism or a description of any one person's motion perception. The average difference was small, and performance varied widely across studies and individuals, with no clear moderators.