"The aim of this study was to examine the relationship between bilingualism and performance on cognitive control tasks (Attention Network Task (ANT), Stroop Color Word Task (SCWT), Stop Signal Task (SST), and Verbal Maintenance and Manipulation Task (VMNM)) using a UCLA database consisting of monolinguals and English-Spanish bilinguals. Previous studies have shown mixed results on bilingual performance compared to monolinguals (advantage or disadvantage), which suggests the continued need for appropriate assessment instruments and norms specific for bilingual speakers in order to reliably and accurately differentiate monolinguals with a language impairment from typically developing bilinguals (Bailey, Venta, & Langley, 2020). We initially examined the effects of bilingual dominance index on conflict effect response time on the ANT and SCWT. Dominance index did not predict performance on either of the tasks. These results suggest that language fluency tests may not be a good predictor of overall cognitive performance on these tests, and available measures cannot reliably and accurately differentiate task performance between monolinguals and bilinguals."