Reciprocal Influences Between Parent Input and Child Language Skills in Dyads Involving High- and Low-Risk Infants for Autism Spectrum Disorder.
Short parent sentences at 18 months predict stronger language at 24 months in high-risk infants, and the child’s growth then nudges parents to talk more.
01Research in Context
What this study did
Boin and colleagues watched high-risk and low-risk babies and their parents at home. They tracked how long parents’ sentences were when the child was 18 months old. Six months later they tested the children’s language skills.
The team wanted to know if shorter parent sentences early on would predict better talking later. They also checked whether the child’s new words made parents talk more.
What they found
Parents who kept sentences short at 18 months had children with stronger language at 24 months. The effect showed up only in the high-risk group.
The link ran both ways. When high-risk babies started saying more words, parents slowly lengthened their own sentences. Short early input mattered most.
How this fits with other research
Frost et al. (2022) warned us to test whether simplified or full grammar helps toddlers. Choi et al. (2020) give the first hard data: shorter utterances boost later language in high-risk infants.
Mason et al. (2021) listed pre-linguistic cues that clinicians trust. Boin adds an easy parent cue—short MLU—that can be tracked months before those cues appear.
Ee et al. (2022) showed play diversity predicts big language jumps after JASPER. Boin shows parent talk style predicts growth before any therapy starts.
Why it matters
You can coach parents of high-risk babies to keep early sentences short and concrete. No extra toys or drills are needed—just brief, clear talk during diaper changes, meals, and play. Six months later you may see faster vocabulary growth, giving the child a stronger foundation for natural environment teaching or JASPER.
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02At a glance
03Original abstract
We examined the language input of parents of infants at high and low familial risk for autism spectrum disorder (ASD) and investigated reciprocal associations between parent input and child language skills in the first 2 years of life. Parent-infant dyads (high-risk: n = 53; low-risk: n = 33), 19 of whom included an infant later diagnosed with ASD, were videotaped during free play interactions at 12, 18, and 24 months. Measures of parent input were derived from parent-child interactions. Children's language skills were assessed using the Mullen Scales of Early Learning at 12, 18, and 24 months. Results suggested that (a) parents of high- and low-risk infants produced similar word tokens, word types, and proportions of contingent verbal responses, but parents of high-risk infants used shorter mean length of utterances (MLU) than parents of low-risk infants at 18 and 24 months; (b) parents' MLU at 18 months was positively associated with their infants' language at the subsequent visit after 6 months, regardless of group; and (c) infants' language at 18 months was positively associated with parents' MLU at the subsequent visit after 6 months in the high-risk group only. These findings contribute to our understanding of the mechanisms underlying early language learning of high-risk infants who have an increased risk for language delays and deficits. Autism Res 2020, 13: 1168-1183. © 2020 International Society for Autism Research, Wiley Periodicals, Inc. LAY SUMMARY: Parents provide an important source of language input to their children. In this study, we looked at parent input to infants at high- and low-risk for autism spectrum disorder and relations between parent input and child language in the first 2 years of life. We found that parents of high- and low-risk infants provided similar quantity and quality of input, except shorter average length of utterances at 18 and 24 months in the high-risk group. Also, there were bidirectional relations between parent input and child language at 18 and 24 months in high-risk pairs, suggesting that parents and children collectively shape the early language environment.
Autism research : official journal of the International Society for Autism Research, 2020 · doi:10.1002/aur.2270