“…The BDI was selected because (a) it covers a broad age range (birth to 8 years); (b) it provides adaptations for children with sensory and motor disabilities; and (c) it assesses children's development across five broad domains (personal-social, adaptive, motor, communication, and cognitive). A number of studies assessing the psychometric properties of the BDI have found the instrument appropriate for use in early intervention programs (Boyd, Welge, Sexton, & Miller, 1989;Johnson, Cook, & Killman, 1992;McLean, McCormick, Bruder, & Burdg, 1987;Sexton, McClean, Boyd, Thompson, & McCormick, 1988). The BDI was administered by research staff who participated in intensive training on standardized administration of the BDI.…”