This study compared the efficacy of measures of naming speed, verbal fluency and self-ratings for establishing language dominance in 25 bilingual English-Spanish adults with college degrees. Naming speed was measured by total naming times (in seconds) for five "Alzheimer's Quick Test" tasks (Wiig, Nielsen, Minthon & Warkentin, 2002) and verbal fluency with the "Word Listing by Domain" (Lambert, Havelka, & Crosby, 1958; Fishman & Cooper, 1969). Self-ratings of English-Spanish competence (listening, speaking, reading, and writing) and frequency of use of each spoken language served as standards for comparisons. For the aggregate sample, color-form, color-animal, and color-object naming times were significantly shorter for English than Spanish (p < 0.01). There was 100% agreement in language-dominance judgments between self-ratings of language competence and frequency of use, and color-form, color-animal, and color-object naming-time differences in the two languages. "Word Listing by Domain" quotients for language dominance showed a lower degree of agreement (52%) with self-ratings and naming-time differences. The findings suggest that cross-linguistic comparisons of naming times for color-form, color-animal, and color-object naming may be helpful in screening adults for language dominance for psychoeducational assessment purposes. (Contains 1 table.)