Moderated mediation models estimating whether the relationship between input and expressive language skill is mediated by regional gamma power, conditional on diagnostic outcome. Numbers on pathways indicate unstandardized regression coefficients. The index of moderated mediation is significant for all models shown (see text), and in all cases, the mediation is significant for HRA+ and not for HRA− toddlers. MLU= Mean Length of Utterance; HRA+ = High risk of Autism, diagnosed with ASD; HRA− = high risk of Autism, not diagnosed with ASD. †p < .1, *p < .05, **p < .01, ***p < .001, ‡significant by bootstrapped confidence intervals.