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ABSTRACTIs parental report of comprehension valid for individual words? If so, how well must an infant know a word before their parents will report it as 'understood'? We report an experiment in which parental report predicts infant performance in a referent identification task at 1 ; 6. Unlike in previous research of this kind (i.e. Houston-Price, Mather & Sakkalou, 2007), infants saw items only once, and image pairs were taxonomic sisters. The match between parental report and infant behaviour provides evidence of the item-level accuracy of both measures of lexical comprehension, and informs our understanding of how British parents interpret standardized Communicative Development Inventories (CDIs).

Original publication




Journal article


J Child Lang

Publication Date





895 - 908


Analysis of Variance, Child Language, Comprehension, Eye Movement Measurements, Humans, Infant, Language Tests, Parents, Speech Perception, Time Factors, Vocabulary