“…Early assessment and diagnosis is, therefore, important in order to appropriately meet and adapt to the changing needs of children with an intellectual disability (Herbert, 2006;McGinty & Fish, 1992), to identify and provide specific interventions to improve the skills and functioning of the child (Chadwick, Cuddy, Kusel, & Taylor, 2005), to help others understand the child's needs (Goodman & Linn, 2003), and to provide support and information to family members (Hassall, Rose, & McDonald, 2005;Howie-Davis & McKenzie, 2007).…”