This finding replicates and extends prior work on verb learning in children with ASD by demonstrating that they can attend to a novel verb's syntactic distribution absent relevant visual or social context, and they can use this information to assign the novel verb an appropriate meaning. We discuss points for future research, including examining individual differences that may impact success and contrasting social and nonsocial word-learning tasks directly.

Children with language disorders have particular difficulty with verbs, but when this difficulty emerges is unknown. We examined syntactic (transitive, intransitive, ditransitive) and semantic (manner, result) features of two-year-olds’ verb vocabularies, contrasting late talkers and typically developing children to look for early differences in verb vocabulary. We conducted a retrospective analysis of parent-reported expressive vocabulary from the Language Development Survey (N = 564, N(LT) = 62) (Rescorla, 1989). Verbs were coded for the presence or absence of each syntactic and semantic feature. Binomial mixed-effects regressions revealed the effect of feature on children's knowledge and whether feature interacted with group classification. Our results revealed mostly similarities between late talkers and typically developing children. All children's vocabularies showed a bias against verbs that occur in ditransitive frames. One feature showed a difference between groups: late talkers showed a bias against manner verbs that typically developing children did not.

Much research has asked why verbs are difficult to acquire, and how toddlers nevertheless acquire them. Still, we know little about what kinds of verb meanings are easy or difficult to acquire. We revisit Rescorla and colleagues’ data on vocabulary knowledge in toddlers acquiring English, Italian, Greek, Korean, and Portuguese measured using the Language Development Survey. We coded the survey’s verbs for several semantic features to determine which features predict appearance in toddlers’ vocabularies. For English, manner and result verbs were equally well known across samples, but verbs labeling durative events and events with fewer event participants were more likely to be known than those labeling punctual events and events involving more participants. Similar trends held in the other languages.

Purpose Verb learning is a critical but challenging part of language acquisition. Children with or at increased risk for developmental language disorder may particularly struggle with verb learning, and poor verb representations in turn may negatively impact children's language outcomes. Our goal is to examine literature on children's acquisition of verbs, identifying manipulable factors that may determine the ease or difficulty of acquiring a new verb meaning. Method In this narrative, nonsystematic review, we discuss findings about how verbs are learned and represented. Results Several aspects of the learning environment affect children's efforts to acquire verbs, including the linguistic context in which the verb is introduced, the timing of the linguistic label relative to the event it describes, the visual and linguistic variability, and the dose frequency. Conclusions We conclude that some learning situations are likely to be more helpful for children in the process of verb learning than others. We highlight some of the factors that contribute to good learning situations, and we discuss how these may differ depending on properties of the child and of the verb itself. Finally, we propose hypotheses for future translational and clinical research.

No abstract