Infancy. 2025 Jan-Feb;30(1):e12649. doi: 10.1111/infa.12649. ABSTRACT The interplay of emotional availability (EA) and child temperament in association with early language development is understudied. We explored associations between maternal EA and infant communicative development and possible moderations by child temperament. Participants were 151 mother-child dyads from the FinnBrain Birth Cohort Study.