One particularly fascinating aspect is determining how lexical structures are represented in the brains of bilinguals versus monolinguals, as bilinguals must map two different languages. Particularly, researchers have been interested in determining if a bilingual individual has two separate lexicons for each language or one containing both. found that the language input children received was important in "determining how independent one language will be from the other in the child's mind" (p. 646). Research on how lexical items are accessed in a bilingual brain has tended toward a mixed representation, where there is interconnectivity and some overlapping of the two lexicons but other items stay separated.