Effectiveness of home-based early intervention on the language development of children of mothers with mental retardation.
Brief weekly BST at home lets moms with intellectual disability push their toddlers’ language into the normal range and cut time to first words.
01Research in Context
What this study did
Researchers ran a home-based RCT with mothers who have intellectual disability. Each mom got one-on-one BST: short lessons, live demos, instant feedback, and small prizes for practice.
Coaches taught moms to talk more, wait longer, and respond warmly during play. Kids were toddlers with language delays. The team tracked mom talk and child words for over a year.
What they found
Kids in the training group hit normal language levels and said their first words months sooner. Moms doubled their positive talk and kept the gains for 82 weeks.
When the wait-list moms later got the same coaching, their kids caught up too. The effect replicated without extra visits.
How this fits with other research
Wanchisen et al. (1989) piloted the same BST package in single-case style. The 1993 paper powers up that sketch into a full RCT and shows the kids, not just the moms, benefit.
Irvin et al. (1998) and Bromley et al. (1998) swap the curriculum for TEACCH or intensive ABA and move to autism preschoolers. They still see big home-based gains, proving the delivery model travels.
Roberts et al. (2023) updates the RCT idea for 2020s autism families. They compare responsive versus directive language coaching and again find responsive wins—echoing the 1993 focus on parent warmth.
Why it matters
You can teach parents with intellectual disability to be effective language coaches. One hour a week in their living room beats clinic-only services. Use brief demos, on-the-spot praise, and toy rewards. The skills stick, and the child gains last. If you run early-intervention programs, add a home BST track for high-risk families; the 1993 protocol is your ready-made manual.
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02At a glance
03Original abstract
The authors evaluated the effects of a home-based parent training program for mothers with mental retardation on the language development of their children who were at risk for language delay. The participants, 28 mothers labelled mentally retarded with children under 28 months of age, initially showed significantly fewer positive mother-child interactions and child vocalizations and verbalizations than did a comparison group of 38 families with children of similar age whose mothers were not mentally retarded. The 28 mothers with low IQ were then matched on child entry age and randomly assigned to either an interaction training or attention-control group (this group received training in safety and emergency skills unrelated to interactions). Interaction training consisted of verbal instruction, modelling, feedback, and tangible reinforcement. After training, the training group scores were no longer lower than those of the comparison group of mothers without mental retardation and were also significantly higher than the scores of the attention-control group on all maternal positive interactions, child vocalizations, verbalizations, and language and social domains of the Bayley Scales of Infant Development. Speech emerged significantly sooner in the training group as compared to the control group. The training group parents and children maintained improvements up to 82 weeks following training, and the attention-control group, when subsequently trained, replicated the original training group results. Thus, home-based parent training increased positive maternal interactions of mothers with mental retardation, which facilitated language development in their young children.
Research in developmental disabilities, 1993 · doi:10.1016/0891-4222(93)90010-h