Right temporoparietal gray matter predicts accuracy of social perception in the autism spectrum.

David et al. (2014) compared how well people with and without autism read social motion. They used point-light videos of people moving. Some clips showed social actions like waving. Others showed random dots or simple motion.

The team also scanned each person's brain. They measured gray matter volume in the right temporoparietal area. This spot helps us judge what others are doing.

Only the social clips tripped up the autism group. On non-social motion tasks both groups scored the same. This shows the problem is social, not visual.

Smaller gray matter in the right temporoparietal junction went hand in hand with worse social motion scores. Structure and skill lined up.

Chien et al. (2015) looked at the same brain area one year later. They found boys with autism had extra wiring, not less volume, and the extra wiring still predicted social trouble. Structure and connectivity both matter, just in different ways.

Li et al. (2025) slid slightly forward on the brain surface. They saw weak wiring in the right pSTS-mSTS slice of the social visual path. Again, poorer links meant worse social symptoms. The story is building: right-side social motion hardware is off in autism.

Lerner et al. (2012) seems to clash at first. They saw no group difference on biological motion, but their adults had high IQs. Nicole's wider ability range let the deficit show. Same task, different samples, no real contradiction.

You now know social motion errors are not general vision problems. When a client misses body-language cues, drill social motion clips, not basic tracking games. If MRI data are available, peek at right temporoparietal size or pSTS wiring for extra context. Most of all, break complex social scenes into small, clear steps; the 1997 study by K et al. and this one agree that integration, not single cues, is the hurdle.