“…For instance, the MacArthur Juvenile Adjudicative Competence study reported that approximately one-third of adolescents aged 11-13 and one-fifth of adolescents aged 14-15 had impairments in their legal understanding and/or their ability to reason about legal decisions (Grisso et al, 2003). Other studies have examined the characteristics of juvenile defendants referred for competence evaluations and restoration (e.g., Kruh, Sullivan, Ellis, Lexcen, & McClellan, 2006;McGaha, Otto, McClaren, & Petrila, 2001), approaches for assessing adolescents' competence (e.g., Christy, Douglas, Otto, & Petrila, 2004;Ryba, Cooper & Zapf, 2003), and strategies to improve adolescents' legal capacities (e.g., Cooper, 1997;Viljoen & Grisso, 2007).…”