%0 Journal Article
%T Effects of grammatical category and morphology on fast mapping in typically developing and late talking toddlers
%A Eva Murillo Sanz
%A Irene Rujas
%A Marta Casla
%A Miguel L¨¢zaro L¨®pez-Villase£¿or
%A Sonia Mariscal
%J First Language
%@ 1740-2344
%D 2019
%R 10.1177/0142723719828258
%X The purpose of this study was to examine early fast mapping abilities in late talkers (LT) and typically developing (TD) Spanish-speaking children by considering the effect of different variables on fast mapping (age, vocabulary level, grammatical category and number morphology). Thirty-eight Spanish-speaking children were assessed at three times (21 to 24 months at the beginning of the study). A group of LT was matched in age with a TD control group. They completed a fast mapping task with a disambiguation phase and an extension phase. Results show that vocabulary level and age interact with grammatical category and number morphology. TD children¡¯s performance was significantly higher than LT children¡¯s, but these differences decreased with age. Results suggest that the incorporation of new labels does not work automatically; some children may need repeated exposures to word¨Creferent pairings. Longitudinal results suggest the importance of looking at the dynamics of lexical acquisition in addition to vocabulary size
%K Early vocabulary size
%K early word learning
%K fast mapping
%K language development
%K late talkers
%K Spanish toddlers
%U https://journals.sagepub.com/doi/full/10.1177/0142723719828258