“…Sixteen studies examined associations between age and various aspects of competence. Nine studies found no relationship between a child's age and various aspects of competence for consent or assent (Abramovitch et al, 1995;Billick et al, 1998;Casimir & Billick, 1994;Dorn, Susman, & Fletcher, 1995;Fogas et al, 2001;Kaser-Boyd et al, 1986;Mulvey & Peeples, 1996;Susman, Dorn, & Fletcher, 1992), one study found a positive relationship between age and understanding (Billick et al, 2001), and six had mixed results regarding age (Ambuel & Rappaport, 1992;Kaser-Boyd, Adelman, & Taylor, 1985;Scherer, 1991;Tait, Voepel-Lewis, & Malviya, 2003;Urberg & Rosen, 1987;Weithorn & Campbell, 1982). For studies with mixed results, age was associated with some aspects of competence but not with others, or there were age differences for some decision-making scenarios but not for others.…”