“…Defined as "a main clause plus all subordinate clauses and nonclausal structures attached to or embedded in it" (Hunt, 1970, p. 189), the T-unit was originally used to measure the syntactic complexity of children's written language. Measures of syntactic complexity for spoken discourse range from semantic units (Sato, 1988;Pica et. al., 1989;Kroll 1977) to intonational units (Crystal & Davy, 1975;Chafe, 1980;Crookes & Rulon, 1985;Ellis et al, 1994;Foster & Skehan, 1996) to syntactic units (Quirk et al, 1985;Kroll, 1977;Hunt, 1970).…”