Fig. 1: Infants at elevated-likelihood of ASD show lower ELCS compared to low-likelihood infants at 36 months of age.

Infants were assessed using the MSEL test at 5- and 36-months of age. a At 5 months of age, no significant differences were observed between groups. b At 36 months of age, the elevated-likelihood group had a significantly lower ELC scores compared to the low-likelihood (p = 0.0002). c Infants in the low-likelihood group had a significant increase in their ELC scores between 5 and 36 months, while this developmental change was not observed in the elevated-likelihood group (d). Boxplots represent first (lower), median and third (upper) quartile. Wilcoxon test: ***p < 0.001. ELCS Early Learning Composite Scores, EL elevated-likelihood, LL low-likelihood.