“…The use of self-report measures for determining gang involvement has been widely supported in the field of youth gang research (e.g., Boxer, Veysey, Ostermann, & Kubik, 2015; Bjerregaard & Smith, 1993; Dishion, Patterson, Stoolmiller, & Skinner, 2005; Esbensen, Winfree, He, & Taylor, 2001; Fox, Lane, & Akers, 2010; Klein, 1995; Tapia, 2011; Thornberry, Krohn et al, 2003). In the current study, self-reported gang membership was measured prospectively from 7 th to 10 th grade, in 12 th grade, and subsequently every three years in adulthood.…”