... However, the evidence is limited for (1) the existence of stable distortions in offenders' cognition and (2) the impact of treatment of cognitive distortions on treatment efficacy. In this chapter, we appraise two of the most influential theories of cognitive distortions in sexual offenders against children: Abel's early theory (Abel, Becker, & Cunningham-Rathner, 1984;Abel, Gore, Holland, & Camp, 1989;Abel, Rouleau, & Cunningham-Rathner, 1986), and Ward's Implicit Theories Theory (Ward, 2000;Ward & Keenan, 1999). We also evaluate the Judgment Model of Cognitive Distortions (Ward, Gannon, & Keown, 2006;Ward, Keown, & Gannon, 2007), which, although less influential than its predecessors, in our view provides the most complete account of child sexual abusers' cognitive distortions to date. ...