ERIC Number: ED229210
Record Type: Non-Journal
Publication Date: 1983-Mar
Reference Count: N/A
Evidence of the Impact of Bilingual Education: A Meta-analysis.
Powers, Stephen; Rossman, Mark H.
C.F. Leyba conducted a longitudinal study (1972-77) of the Title VII Bilingual Education Program in the Santa Fe Public Schools involving 1,257 students in grades 1-6. Three groups were studied: a longitudinal treatment group (LTG) which received uninterrupted bilingual education for a span of years; a nonlongitudinal treatment group which received bilingual education two or more years but only intermittently, due to dropping out and later returning; and control groups which were randomly selected each year from Title VII participating schools. The present study re-examined the Leyba data for the LTG and controls employing meta-analysis to obtain an overall estimate of the effect size of the program in reading and mathematics and to test the effect size for significance. The study used a weighted, unbiased estimate of effect size. Leyba reported a total of 16 comparisons of the LTG and controls in reading and 16 comparisons in mathematics. Data were analyzed using a computer program. Analysis showed an overall effect of the program on the students' mathematics achievement. The overall effect of the program did not reach statistical significance in reading. Results suggested gains for bilingual education students which clearly do not support a hypothesis of deleterious effects of bilingual education. (NQA)
Publication Type: Reports - Research; Speeches/Meeting Papers
Education Level: N/A
Authoring Institution: N/A