Meta-analysis of parent-mediated interventions for young children with autism spectrum disorder.

Stewart et al. (2018) pooled 23 smaller studies that taught parents how to work with their autistic children under age six. They looked at every paper that compared parent coaching to no coaching and measured autism symptoms, talking, thinking, or social skills.

The team used meta-analysis math to turn each study’s results into one common score. This let them see if parent training helps across many labs and kids.

Kids whose parents got training improved a little in every area tested. The gains were small but real, and they showed up in both parent reports and direct tests.

Quality of the studies has risen since 2000, yet most still lack blind raters and long follow-ups.

Breider et al. (2024) ran a fresh RCT with older autistic kids and found face-to-face parent training still beats waitlist, while blended online-plus-live sessions did not. This extends E et al.’s small-effect story: format and age matter.

Sutton et al. (2022) tried a mindfulness group for parents instead of child skills. They saw large drops in parent stress, something E et al. barely touched. The new study widens the target from child gains to caregiver well-being.

Bello-Mojeed et al. (2016) delivered only five group sessions in Nigeria and still cut aggression. Their pilot hints that even brief, low-cost versions can work outside wealthy clinics, supporting E et al.’s claim that parent training travels.

You can tell funders that parent coaching has proof across 23 studies, but keep expectations modest—gains are small. Use live, in-person formats when possible, and consider adding a parent resilience module to protect caregivers from burnout. If you’re in a rural or low-resource spot, shorten the package and focus on core behavior skills; the evidence says it still helps.