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Differential effects of a systematic vocabulary intervention on adolescent language minority students with varying levels of English proficiency
Hwang, J. K., Lawrence, J. F., Mo, E., & Snow, C. E. (2014). Differential effects of a systematic vocabulary intervention on adolescent language minority students with varying levels of English proficiency. International Journal of Bilingualism, 19(3), 314–332. http://doi.org/10.1177/1367006914521698
Abstract: The purpose of this study was to understand the reading performance of subgroups of language minority students and examine whether a research-based academic vocabulary intervention, Word Generation, has differential effects on these students’ academic vocabulary knowledge. Thirteen middle schools, propensity-score matched based on their achievement and demographic data, were randomly assigned to either treatment (n = 3,539) or control (n = 2,630) conditions. Students in both conditions were classified as either English-only (EO) or language minority students. The language minority students were further grouped as either being initially fluent English proficient (IFEP), redesignated fluent English proficient (RFEP), or limited English proficient (LEP). Multivariate analysis of variance and hierarchical linear models revealed three important findings. First, while LEP students’ scores on reading measures were significantly below those of the EO students, RFEP students’ scores were comparable to EO students’ scores. In addition, IFEP students’ scores were higher than those of the EO students. Second, there were variations within the RFEP students when they were disaggregated by time since redesignation; RFEP students’ reading scores were positively correlated with time since redesignation. Third, the treatment effect emerged only as an interaction with RFEP status. This study suggests that the benefits of a research-based intervention may vary according to students’ level of English proficiency
Funders: This work was supported by Grant Number R305A090555, Word Generation: An Efficacy Trial from the Institute of Educational Sciences, US Department of Education (Catherine Snow, PI). https://ies.ed.govhttps://www.ed.gov
Lawrence, J.F. (2015, September). Technology in English. U.S. Department of State, Bureau of Educational and Cultural Affairs. The White House, Washington D.C.
Warschauer, M., & Lawrence, J. F. (2014, April). The Learning Analytics of Cloud Based Writing. Google Campus, New York, New York
Lawrence, J.F. (2012, September). Does talk exposure in preschool predict second-language vocabulary at age 10? A longitudinal study of Turkish immigrant children growing up in Norway. 学前教育中的语言接触是否会预测儿童10岁时的第二语言词汇？(Presented in Mandarin). East China Normal University, Shanghai, China.