The Ecological Validity of Research Studies on Function-Based Interventions in Schools for Children With Autism Spectrum Disorder.
Most school FBA studies skip the key question: does it work in a real classroom?
01Research in Context
What this study did
The team looked at 55 single-case studies on function-based interventions in schools.
All studies involved kids with autism.
They asked: how many actually checked if the intervention works in a real classroom?
What they found
Only 7 out of 55 studies measured ecological validity.
About half used teachers as the main helpers, but many ran sessions in quiet corners with extra staff.
Most papers left out key details like how long sessions lasted or who did what.
How this fits with other research
Jonsson et al. (2016) found the same gap in autism social-skills trials. They showed most RCTs skip external-validity details too.
Lord et al. (2005) warned about weak methods 17 years earlier. The new review shows little has changed.
Kok et al. (2026) looked at 270 externalizing-behavior cases. Like this review, they found effects fade when sessions stop. This suggests the missing classroom details matter for keeping gains.
Why it matters
When you read a study claiming "function-based intervention works," check the fine print. If it ran in a quiet room with three adults, it may not work in your busy class. Ask vendors for teacher-implementer data, session length, and real-classroom replications before you buy in.
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02At a glance
03Original abstract
Our main purpose in this review was to determine the extent to which ecological validity was demonstrated and assessed in single-case experimental design (SCED) studies examining the effectiveness of function-based interventions (FBIs) for children with autism spectrum disorder (ASD) within schools. We reviewed 55 SCED studies published between 1985 and 2019 to identify indicators of ecological validity and the instruments used to assess it. We also conducted an analysis to determine the extent to which implementation procedures were described. Results indicated that approximately half of the assessments and FBIs were conducted by teachers in classrooms. Approximately 50% of the assessments and FBIs were implemented within the context of isolated sessions and required multiple implementers. Ecological validity was assessed in seven of the studies reviewed. A complete description of implementation procedures was provided for approximately half of the assessments and FBIs. Limitations of the present review and future directions for research are discussed.
Behavior modification, 2022 · doi:10.1177/0145445520964921