“…It is an age period when sufficient opportunity for the development of both languages has occurred (except for those most recent arrivals), such that the level of bilingualism attained can be considered to have reached some state of stability. There is mounting evidence of ongoing interaction between the two languages in younger bilinguals (for example, Merino 1983 who assessed bilingual proficiency in kindergarten through fourth graders; Brewer Bomar 198 1, who studied lexical and syntactical interference in four-year-olds; and Kaufman and Aronoff in press, who studied the verbal system in a two-year old), but by adolescence, it is assumed that this process would have stabilized. At this period,furthermore, most subjects still live at home, and they are subject to the influences of the home language environment, a variable that has been determined to be important in Veltman's analysis.…”