His research interests are in the area of monolingual and bilingual language processing, computational models of language processing, and neuroimaging studies of the bilingual brain. His current work investigates word processing in monolinguals and bilinguals (e.g., orthographic and morphological processing, automatic translation), cognitive control in bilinguals, and incidental foreign language acquisition. He is also working on computational models of language processing and cognitive control (e.g., models of bilingual word processing, letter position coding, and Stroop).