Poster F42, Tuesday, March 27, 8:00-10:00 am, Exhibit Hall C
The relationship between lexical development and neural measures of speech discrimination in monolingual and bilingual children: Longitudinal evidence
YAN H. YU1, Valerie L. Shafer2, Carol Tessel3, Michelle MacRoy-Higgins4, Nancy Vidal5, Alahna Cogburn2, Richard Schwartz2; 1St. John's University, 2The Graduate Center, City University of New York, 3Florida Atlantic University, 4Hunter College, City University of New York, 5Iona College
The relationship between language development and neural measures in bilingual children are complex due to great variations in language input for each language and the phonological similarities/dissimilarities of the two languages. This study examines the relationship between language experience (input), lexical growth and neural indices of speech perception development in monolingual English and bilingual English-Spanish children. Behavioral measures of lexical development, neural measures of speech perception and language input were obtained from 21 monolingual English and 20 bilingual Spanish-English children at multiple time points between six months and five years of age. Neural measures were collected from 65 electrode sites to an English-only vowel contrast (/I/ in ‘bit” versus /ε/ in “bet”) in an oddball paradigm designed to elicit the mismatch negativity (MMN). Results revealed that children with monolingual and bilingual backgrounds have similar vocabulary at 12 months of age but monolingually-exposed children showed larger English productive vocabularies at the beginning of 2 years of age. A larger proportion of English monolingual compared to bilingual children had a clear MMN. Mixed-effects modeling reveals that both language group and age modulate MMN.
Topic Area: LANGUAGE: Development & aging