The standardization methodology was used to analyze omitted responses of Hispanic examinees on the Scholastic Aptitude Test. Results indicate that both Mexican American and Puerto Rican students omitted less than White students of comparable ability but that Mexicans Americans tended to omit even less. Examination of items with the least differential omit rate by both Hispanic groups indicate that items with true cognates or words with a common root in English and Spanish were omitted differentially less. Some dependency on ability level was observed for the omit patterns of Puerto Rican examinees. (22pp.)