The microgenesis of global perception in autism.

Plaisted et al. (2006) flashed abstract pictures to kids for tiny fractions of a second. They asked: Do children with autism build the same first mental snapshot as typically developing peers?

The team measured how fast each child grouped small features into a whole shape. They compared kids with autism to same-age peers.

Both groups formed the global shape equally well. Kids with autism showed no local bias during the first moments of seeing.

The data say early vision works the same across groups. Brief exposure does not expose a processing gap.

Leung et al. (2011) ran a near-copy study and got the same null result for proximity grouping. They add that shape similarity grouping, not proximity, is the weak spot in autism.

Scherf et al. (2008) seems to disagree. They found that global shape skill never improves with age in autism. The clash is only on the surface: Kate looked at the very first snapshot, while Suzanne tracked growth across years.

Busch et al. (2010) and Van Eylen et al. (2018) extend the story. Both show tasks matter. Kids with autism can group by space but stumble when color or orientation must bind together. The picture is not one-size-fits-all.

If you test global perception with quick flashes, expect typical results. Switch to shape or color cues and you may see gaps. Match your probe to your goal: use spatial layouts for fast mapping, but break down feature patterns when you need to teach similarity rules.