One size does not fit all for parent-mediated autism interventions: A randomized clinical trial.
Megan Y Roberts, Bailey J Sone, Maranda Jones and 6 others
PMID 35695680WHAT IT FOUND
Mothers taught responsive language strategies showed greater improvement than those taught directive strategies.
Mothers' subclinical autism-like traits made no difference on their own, but whether they helped or hurt depended on how much strategy use the mother already had before training.
Key findings
01Mothers who learned responsive strategies (following the child's lead, commenting on what the child is doing) showed significantly greater gains in strategy use at post-intervention than mothers who learned directive strategies (systematic prompting sequences), with an effect size of d = 0.90 (95% CI [0.47, 1.32]).
02At the 3-month follow-up, there was no significant difference in maintenance of strategy use between the two groups (d = 0.23, 95% CI [−0.25, 0.71]). Both groups maintained their post-intervention level of use.
03An exploratory analysis found that BAP status interacted with pre-intervention strategy use: for mothers with below-average pre-intervention skill, BAP[−] mothers made greater gains; for mothers with above-average pre-intervention skill, BAP[+] mothers made greater gains. For mothers in the average range, BAP status had no significant effect.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
Only biological mothers were included; fathers, step-parents, and other caregivers are not represented. Only English-speaking mothers were eligible, limiting generalizability to non-English-speaking families. Single-site study at Northwestern University. The 8-week intervention is shorter than typical NDBI programs (approximately 12 weeks for both strategy types), so the finding may not hold over longer instruction. The primary outcome is parent strategy use, not child language or communication outcomes. Child outcomes are in a separate manuscript. BAP was classified as a binary (present/absent) rather than a continuous variable, and subtypes could not be analyzed (n = 43 BAP+). Pre-intervention strategy use differed between groups (directive lower and more variable), requiring statistical standardization for comparison. 25 of 111 randomized participants were missing at the 3-month follow-up. The BAP × pre-intervention strategy use interaction was an exploratory analysis, not a pre-specified primary hypothesis.
Declared interests
Funded by the NIH (extramural). No other conflicts of interest are stated in the supplied text.
The easy way to misread this
Do not read this as evidence that responsive strategies produce better child language outcomes. The primary outcome was mothers' own use of strategies, not the child's communication. The authors state that child outcomes will be reported in a separate manuscript. Also, the BAP-by-pre-intervention-skill finding was exploratory, not a pre-specified hypothesis, and should not be used as a clinical decision rule without replication.
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