“…The two individual-level variables most important to consider in the current context are sentence length and time served. Evidence concerning the extent and direction of the relationship between sentence length and violent misconduct has been mixed (Berk, Kriegler, & Baek, 2006;Cunningham & Sorensen, 2007a;Flanagan, 1980;Porporino, 1986). Time served by the beginning of the observation period was included to control for the stage of an inmate's confinement (Flanagan, 1980;Sorensen, Wrinkle, & Gutierrez, 1998;Thompson & Loper, 2005;Toch & Adams, 2002;Zamble, 1992).…”