Exploring the relations between child and word characteristics and preschoolers' word-learning

Preschool vocabulary interventions have reported modest increases in learning of target words, with wide variability among participants. To design interventions that are effective for all learners, more fine-grained information is needed. In the present study, English-only and dual language learner preschoolers (n = 128) were taught new words during shared book-reading. Using cross-classified random effects models, we investigated how both child and word characteristics related to vocabulary learning. Preschoolers were assessed on general receptive vocabulary (PPVT), executive function skills, and expressive knowledge of target words at pretest and posttest. Target words were rated on their perceptual accessibility, as captured by imageability, concreteness, and consistency of shape. Controlling for other predictors, target word pretest scores, PPVT, executive function skills, and words' imageability were all positive significant predictors of posttest vocabulary. Tailoring instructional strategies to better account for these factors may help to support the learning of a range of children and word types.