The findings of 3 studies on the patterns of use of Spanish among Mexican American boys and girls and the relationship between an index of use of Spanish and level of aspiration were compared in this paper. The studies were conducted in South Texas during the spring of 1967, in El Paso during the spring of 1973, and in Southern Colorado during the spring of 1969. The sample used in the South Texas study consisted of 596 sophomore Chicanos from 7 rural high schools in 4 counties close to the Mexican border. In the El Paso study, 310 Mexican American sophomores and seniors in 12 metropolitan schools in the El Paso and Ysleta school districts were interviewed. The Colorado study used 667 Mexican American students from 11 rural junior and senior high schools. The subjects were asked to respond to a questionnaire on the use of Spanish. The comparison of the findings indicated (1) that the Chicano youths in Colorado use spoken Spanish less but read more in mass Spanish language publications, (2) that the Texas Chicanos use more spoken Spanish but read less in mass Spanish literature, and (3) that the use of Spanish over English is not meaningfully related to the levels of aspiration. The findings of each study are presented in tabular form. Related documents are ED 023 511, ED 023 512, ED 040 777, ED 051 943, and ED 053 852. (NQ)