Concurrent Validity of the Modified Checklist for Autism in Toddlers (M-CHAT): Socio-cognitive and Verbal Skills in 18-Month-Old Infants.
In typically developing 18-month-olds, higher M-CHAT scores point to slightly lower language and social skills measured the same day.
01Research in Context
What this study did
The team gave the M-CHAT to 18-month-old typically developing babies. They also tested each child’s word learning, emotional understanding, and spoken vocabulary on the same day.
The goal was to see whether M-CHAT scores line up with real-time language and social skills in kids who have no autism diagnosis.
What they found
Babies who scored higher on the M-CHAT knew fewer words and showed weaker social understanding right then. The link was small but clear: more M-CHAT red flags went hand-in-hand with lower concurrent skills.
How this fits with other research
Nygren et al. (2012) and Kara et al. (2014) both report good news: the M-CHAT helps spot autism in toddlers when staff add a quick joint-attention check. Those studies looked at clinic samples and celebrated high accuracy.
The new study flips the view. It treats the M-CHAT as a continuous ruler inside neurotypical infants and finds that even slight score bumps predict weaker language and social skills right now.
So the tool that flags autism risk can also act like a early gauge of everyday communication strength in typical kids. The earlier positive findings and this negative link do not clash—they simply answer different questions: "Who has ASD?" versus "How are everyday skills doing?"
Xenitidis et al. (2010) add a longitudinal angle: warm maternal style at 18 months forecasts later language gains in children who later develop ASD. Together the papers suggest both parent input and screening scores at this young age carry useful signals.
Why it matters
If you screen with the M-CHAT, notice the raw score even when a child passes cut-offs. A few extra marks may guide you to check vocabulary size or social games, letting you start language enrichment months earlier.
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Join Free →After you total the M-CHAT, peek at the score even if it’s below the autism cut-off—if it’s on the high side, probe the child’s vocabulary and add extra language models during play.
02At a glance
03Original abstract
The Modified Checklist for Autism in Toddlers (M-CHAT) is a screening questionnaire for Autism Spectrum Disorder (ASD). Previous findings have confirmed the M-CHAT's sensitivity and specificity across several cultures, yet few studies have considered M-CHAT scores as a distributed trait in a sample of typical infants. The current study examined how the M-CHAT predicts concurrent word learning (experiment 1) as well as socio-emotional understanding (experiment 2) in 18-month-old infants. Results demonstrated that the number of items endorsed on the M-CHAT negatively correlated with the proportion of trials on which infants looked at a toy named by the experimenter as well as performance on the word learning task. In experiment 2, high scores on the M-CHAT correlated with less instrumental helping, less imitation, and a smaller productive vocabulary size.
Journal of autism and developmental disorders, 2021 · doi:10.1007/s10803-020-04379-6