Memory in a monolingual mode: When are bilinguals at a disadvantage?

Comparisons of bilinguals and monolinguals have typically found poorer performance by bilinguals in a variety of memory tasks. However, these studies have used bilinguals who were not native speakers of the monolingual's language, and who were often required to process both languages during the session. In the present study, Native English-speaking bilinguals were compared to English monolinguals on four verbal memory tasks: episodic recognition, lexical decision, object naming, and free recall. Only English words were used in the session to avoid activation of the second language. There were no differences in accuracy between groups on any task. Bilinguals were slower than monolinguals, but only for the list recognition and lexical decision tasks, where language-specific, data-driven processing predominates.