Purpose: The current study addresses a gap in the literature regarding syntactic development of adolescent boys with fragile X syndrome (FXS) and Down syndrome (DS). Specifically, we ask whether syntactic skills plateau or continue to change during adolescence for these groups and whether the profile of syntactic change differs between boys with…

A study examined sentence production errors and syntactic complexity in students' writing in two modes of discourse and at three grade levels. Subjects, average and high developmental students enrolled in seventh, ninth, and eleventh grade classes, each wrote two compositions, one in the descriptive the other in the persuasive mode. Data analysis…