Autism & Developmental

Brief Report: A Randomized Controlled Trial of the Effects of RECALL (Reading to Engage Children with Autism in Language and Learning) for Preschoolers with Autism Spectrum Disorder.

Lo et al. (2021) · Journal of autism and developmental disorders 2021
★ The Verdict

A short parent script that prompts, waits, and praises during story time lifts comprehension and engagement in preschoolers with ASD.

✓ Read this if BCBAs running early-intervention home programs or parent-training clinics.
✗ Skip if School-only teams who do not coach caregivers.

01Research in Context

01

What this study did

Lo et al. (2021) asked parents to read picture books with their preschoolers who have autism.

Parents followed a simple script: prompt, wait, praise. They did this for six weeks at home.

The team then checked if kids understood stories better and joined reading time more often.

02

What they found

Kids in the RECALL group scored higher on story questions and emotion naming.

They also sat longer and talked more during book time than kids who got no extra coaching.

Parent-delivered dialogic reading with clear prompts worked.

03

How this fits with other research

Hou et al. (2025) ran a similar RCT but left out the parent prompts. Their kids still gained language and engagement, showing the core dialogic method is solid.

Shams et al. (2025) stretched the idea further. They mixed story reading with songs and rhymes across the whole day and saw bigger vocabulary jumps.

Dababnah et al. (2025) looked at digital books. They showed that a quick verbal cue like "Look at the word!" pulls autistic preschoolers’ eyes to print. Together these studies say: keep the prompts, but you can deliver them in print, digital, or blended lessons.

04

Why it matters

You can teach parents the RECALL script in one short meeting. Hand them the prompt cards, model once, and send them home. Expect clearer answers to "How does the boy feel?" and longer book time without fuss.

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→ Action — try this Monday

Pick one favorite picture book, make three prompt cards (What? Where? How feels?), and practice the script with the parent before they leave.

02At a glance

Intervention
parent training
Design
randomized controlled trial
Sample size
31
Population
autism spectrum disorder
Finding
positive
Magnitude
medium

03Original abstract

This study investigated the effects of a parent-implemented dialogic reading approach-Reading to Engage Children with Autism in Language and Learning (RECALL)-on the engagement in reading and inference-making ability for preschoolers with autism spectrum disorder (ASD). Thirty-one preschoolers (mean age = 5.90 years, SD = 0.69; 26 boys, 5 girls) were randomly assigned to a treatment or control group. Six weeks of RECALL significantly enhanced story comprehension, emotion knowledge, and reading engagement among preschoolers in the treatment group. This might be the first randomized controlled trial testing the effects of RECALL on children with ASD. Our findings suggest that additional instructional support such as the application of a prompting hierarchy during dialogic reading might help children with ASD reap greater benefits from shared book reading.

Journal of autism and developmental disorders, 2021 · doi:10.1080/00221320903300387