“…The presumption that differential maturity is related to individual differences within age cohorts has been demonstrated in numerous research studies that have addressed a wide variety of issues (e.g., John, Pals, & Westenberg, 1998;. Level of ego development was related to various issues regarded as central to (early) adolescence (Loevinger, 1990;Petersen, 1984), such as identity (Blasi, 1988;Blasi & Milton, 1991;Kroger, 1989), moral judgment (Gfellner, 1986;Snarey, 1998), problem behaviors (Noam et al, 1984;Novy, Gaa, Frankiewicz, Liberman, & Amerikaner, 1992), coping (Hauser, Borman, Bowlds, et al, 1991;, ego resiliency (Westenberg & Block, 1993), depression (Rierdan, 1998;Rierdan & Koff, 1991, 1993, suicide (Borst & Noam, 1993;Borst, Noam, & Bartok, 1991), social anxieties (Westenberg, Siebelink, Warmenhoven, & Treffers, 1999;Westenberg, Siebelink, & Treffers, 2001), gender differences (Cohn, 1991), interpersonal style and peer relations (Hansell, 1981;Hauser, 1978), risk taking (Kishton, Starrett, & Lucas, 1984;Philliber, Namerow, Kaye, & Kunkes, 1986), and parental style and family contexts (e.g., Adams & Jones, 1981;Allen, Hauser, Bell, & O'Connor, 1994;.…”