Determining Associations Between Intervention Amount and Outcomes for Young Autistic Children: A Meta-Analysis.

Area of Science:

• Developmental Psychology
• Clinical Psychology
• Pediatrics

Background:

• Intensive early interventions (20-40 hours/week) are commonly recommended for autistic children.
• However, the evidence supporting these intensive approaches is limited and often methodologically flawed.

Purpose of the Study:

• To investigate the association between different measures of intervention intensity and their effects on developmental outcomes in young autistic children.
• This study aimed to clarify the relationship between the quantity of intervention and its effectiveness.

Main Methods:

• A meta-analysis of 144 studies involving 9038 autistic children (aged 8 years or younger) was conducted.
• Meta-regression models analyzed the association between intervention amount (daily intensity, duration, cumulative intensity) and effect sizes, controlling for various study and participant factors.

Main Results:

• No significant positive association was found between any metric of intervention amount and intervention effect size across different intervention types.
• The findings indicate that increasing the quantity of intervention does not necessarily lead to greater developmental gains.

Conclusions:

• Current evidence does not support the claim that more intensive early interventions yield better results for autistic children.
• Healthcare providers should be aware of the limited robust evidence base when recommending intensive intervention programs.