Child temperaments, differential parenting, and the sibling relationships of children with autism spectrum disorder.

Rivers et al. (2008) watched families who had one child with autism and one without.

They asked parents to rate each child’s persistence and the warmth or control each parent showed.

No one got an intervention; the team just looked at how these traits lined up with how well the siblings got along.

Kids who kept trying at tasks—especially the typical siblings—had warmer brother-sister bonds.

When parents treated the two children very differently, the bond cooled, most of all when persistence was low.

Mulder et al. (2020) pulled many studies and found children with autism often show low persistence after diagnosis. Rivers et al. (2008) show that same low persistence can drag down the sibling bond, so the trait matters twice.

Levin et al. (2014) found that when the child with autism is older, their behavior problems spill over to the younger typical sibling. Rivers et al. (2008) add that low persistence is the key trait driving that spill-over.

Benson (2012) showed that heavy home ABA programs do not hurt sibling relationships. Taken together, you can run plenty of teaching hours without fear, but still keep an eye on persistence gaps and uneven parenting.

During intake, rate persistence for both children and note any parenting imbalance. If the child with autism gives up quickly and the typical sibling sees one parent always stepping in, plan extra coaching for persistence and brief the parents on fair, even responses. A quick sibling-persistence check plus parent balance tips can protect the bond while you run skill programs.