Testing the Early Differentiation Hypothesis: A Case Study of a Spanish-English Bilingual Child

Abstract

This paper contributes to the field of simultaneous bilingual first language acquisition (2L1). Specifically, it examines the developmental stages of a bilingual child in two languages, Spanish and English. The analysis is performed by analyzing bilingual acquisition data from CHILDES database with the CLAN program. The study aims to support several hypotheses proposed in the field of 2L1 (e. g., The Early Differentiation Hypothesis). The results show that the developmental stages of a bilingual child correspond to the stages of a monolingual child acquiring a language; the only difference is the number of languages that is being acquired. The data also show that the child’s caregivers use certain strategies in their socialization as the important prerequisite for 2L1 (e.g., frequency of input, discourse strategies and maximal engagement with a minority language available in the input). The results of the study confirm the Early Differentiation Hypothesis that argues for the language-specific morphosyntactic patterns in child’s grammar. The study has very important pedagogical implications for parents who raise their children in bi- and multilingual families.