What a landmark study on parent recasts tells us about language intervention

If your child says “I scared” and you answer “You were scared!” — you just used a recast. You repeated your child’s meaning back in a fuller, more grammatically complete form, without stopping the conversation to correct anything. Most parents do this hundreds of times a week without ever being taught to.

Speech-language pathologists have long recommended recasting to families, and for good reason: decades of research show children pick up grammar from recasts. But that recommendation has always carried a paradox, one that a 2001 study by Kerry Proctor-Williams, Marc Fey, and Diane Frome Loeb set out to solve.

The paradox

Children with developmental language disorder (DLD) can learn from recasts. Experimental studies show them acquiring new grammatical forms at rates comparable to younger, language-matched peers when researchers deliberately feed them recasts. So if recasting works, and if these children are surrounded by parents talking to them all day, why does their grammar keep lagging?

Three possible answers: maybe recasts aren’t actually special. Maybe parents of children with DLD provide fewer of them. Or maybe these children need far more recasts than ordinary conversation happens to supply.

What the researchers did

The team recorded 10 children with DLD and 10 typically developing children playing at home with a parent — three times over eight months. Critically, the groups were matched on language level rather than age, so the children with DLD were older (about 41 months) than their typically developing peers (about 24 months) but were producing sentences of roughly the same length.

They counted two grammatical forms: copula BE (is, are, was, were) and articles (a, an, the). Then they counted how often each parent recast those specific forms, and tracked how the children’s own use of them changed.

What they found

Parents of children with DLD recast just as often as other parents. No reliable group difference — not in copula recasts, not in article recasts, not in ordinary non-recast models either. If you have quietly wondered whether your child’s language difficulties trace back to something missing in how you talk to them, this study says no.

But ordinary conversation delivers very few recasts of any one form. Across the whole study, parents produced copula recasts at a rate that never exceeded about one every five minutes. Successful intervention studies deliver them several times more often.

And that natural rate wasn’t enough to move the needle for children with DLD. Among the typically developing children, how often a parent recast copulas early on strongly predicted how well that child used copulas eight months later. Among the children with DLD, that relationship wasn’t there — even though those children did make real gains over the same period. Their progress was coming from somewhere else.

The conclusion is not that recasts fail for children with DLD. It’s that the dose available in everyday conversation is too low. Typically developing children appear able to extract grammar from a trickle. Children with DLD may need a stream.

What this means at home

Pick a target, and pick it with your SLP. Recasting works best concentrated on one or two forms your child is on the verge of using. Scattered recasting across everything is what already happens naturally — and this study suggests that isn’t enough.

Aim for density, not perfection. The goal is many opportunities in a short window. Book sharing, snack time, and pretend play are good hunting grounds because the same words come up again and again.

Recast; don’t correct. “No, say ‘the dog is running'” stops the conversation. “Yes! The dog is running!” keeps it going and delivers the same information. Children don’t have to repeat you for a recast to do its work.

An honest caveat

This was a small study — ten children per group — and correlational, not experimental. Every child with DLD in it was also receiving speech-language services outside the study, which may well account for the gains they made; the authors say so plainly. What the study establishes convincingly is the negative finding: parents of children with DLD are not shortchanging them on input. What it suggests is that these children need more of the same, delivered more deliberately.

That’s not a failure of parenting. It’s a dosage problem — and dosage is something a good therapy plan can solve.

A note on terminology: the 2001 paper uses specific language impairment (SLI), the standard term at the time. This post uses developmental language disorder (DLD), adopted by international consensus in 2017 (Bishop et al.). The two populations largely overlap, though DLD criteria are somewhat broader.

Sources

Bishop, D. V. M., Snowling, M. J., Thompson, P. A., Greenhalgh, T., & the CATALISE-2 Consortium. (2017). Phase 2 of CATALISE: A multinational and multidisciplinary Delphi consensus study of problems with language development: Terminology. Journal of Child Psychology and Psychiatry, 58(10), 1068–1080.

Camarata, S. M., & Nelson, K. E. (1992). Treatment efficiency as a function of target selection in the remediation of child language disorders. Clinical Linguistics and Phonetics, 6(3), 167–178.

Camarata, S. M., Nelson, K. E., & Camarata, M. N. (1994). Comparison of conversational recasting and imitative procedures in children with specific language impairment. Journal of Speech and Hearing Research, 37, 1414–1423.

Fey, M. E., Cleave, P. L., Long, S. H., & Hughes, D. L. (1993). Two approaches to the facilitation of grammar in language-impaired children: An experimental evaluation. Journal of Speech and Hearing Research, 36, 141–157.

Fey, M. E., Cleave, P. L., & Long, S. H. (1997). Two models of grammar facilitation in children with language impairments: Phase 2. Journal of Speech, Language, and Hearing Research, 40, 5–19.

Fey, M. E., Krulik, T. E., Loeb, D. F., & Proctor-Williams, K. (1999). Sentence recast use by parents of children with typical language and specific language impairment. American Journal of Speech-Language Pathology, 8, 273–286.

Fey, M. E., & Proctor-Williams, K. (2000). Recasting, elicited imitation and modelling in grammar intervention for children with specific language impairments. In D. V. M. Bishop & L. B. Leonard (Eds.), Speech and language impairments: Causes, characteristics, intervention and outcome. Psychology Press.

Proctor-Williams, K., Fey, M. E., & Loeb, D. F. (2001). Parental recasts and production of copulas and articles by children with specific language impairment and typical language. American Journal of Speech-Language Pathology, 10(2), 155–168. https://doi.org/10.1044/1058-0360(2001/015) — primary source for this post