Potential sources of bias in dual language achievement tests were identified and examined. Content, concepts, and vocabulary presented in monolingual English curricula may differ drastically from those presented in bilingual curricula. The Spanish or English versions of the Comprehensive Tests of Basic Skills (CTBS) were administered to 1259…

The testing of bilingual students poses particular problems for analyses of performance, item bias, and test adequacy. A test administered in two languages to children selected for their language facility provides a special arena for the study of these problems. The Comprehensive Tests of Basic Skills (CTBS) was selected because the test content…

Discusses research to determine whether the methodology used in English-as-a-Second-Language classes affected scores on the Comprehensive Tests of Basic Skills. Test results of students in a Los Angeles school district exposed to a comprehension-based approach were compared to those exposed to a grammar-based approach. (21 references) (CFM)