Sibling interaction of children with autism: development over 12 months.

Knott et al. (2007) watched the families for one full year. Each family had one autistic child and one typically developing sibling. The kids were 4 to 8 years old.

Researchers filmed the siblings playing at home every three months. They counted how often the autistic child started a friendly move or a little conflict. They also noted who kept the play going.

over the study period, every autistic child made more social moves toward their brother or sister. Friendly hellos and small sharing rose. So did tiny squabbles. The typical sibling still did most of the guiding.

The gains happened without any therapy plan. The kids simply practiced every day at home.

Hutchins et al. (2020) took the next step. They taught siblings short BST lessons: how to invite, share, and praise. Kids with ADHD then jumped from 2 to 15 positive acts per hour. Fiona saw the same climb, but S showed you can speed it up on purpose.

Wichnick-Gillis et al. (2019) used script-fading at school. Autistic children learned to open with "Want to play?" The skill carried over to the living room and worked with siblings, matching Fiona’s home setting.

Simpson et al. (2001) looked at inclusive preschools. Autistic pupils played alone and talked little. That picture feels opposite to Fiona’s friendly gains. The gap is setting: free home play with a loving sibling beats a noisy classroom full of strangers.

You already have a built-in coach in the house: the brother or sister. Let them lead simple games. Give them praise and a few tips, just like S et al. did. No extra staff, no extra cost. One quick role-play before dinner can turn sibling time into daily social therapy.