Developmental patterns of Spanish grammatical morphemes and mean length of utterance in bilingual children

The purpose of this analysis was to define norms for grammatical morpheme development in Spanish for Spanish-English bilingual children ages 4;0-7;6. This study uses secondary data analysis based on two existing datasets. Participants included 334 Spanish-English bilingual children that were recruited from school districts in Texas, Utah, and Pennsylvania. Grammatical morpheme accuracy was determined by performance on the BESA (Bilingual English Spanish Assessment) (Peña, Gutiérrez-Clellen et al., in preparation). Mean length of utterance in words (MLUw) data was collected from language samples. The average percent accuracy of grammatical morphemes was calculated and analyzed as a function of MLUw in Spanish. Results show that the percentage of accurately produced morphemes has a general upward trend as MLUw increases. Clinical and research implications are discussed.