“…Although CBT for LSE is widely used in routine clinical practice, it has yet to be systematically evaluated and to date the evidence-base for this treatment protocol consists only of single case examples (Butler et al, 2008;Chatterton, Hall, & Tarrier, 2007;Fennell, 1997Fennell, , 1998McManus, Waite, & Shafran, 2009), and small uncontrolled evaluations of adaptations for group settings (Rigby & Waite, 2007), for those with learning disabilities (Whelan, Haywood, & Galloway, 2007), for those with psychosis (Hall & Tarrier, 2003) or psychosis with substance abuse (Oestrich, Austin, Lykke, & Tarrier, 2007), and for those in a forensic setting (Laithwaite, 2007). While these case studies suggest that this treatment approach may be an effective way to treat LSE, it has yet to systematically evaluated with a control group, independent assessors who are 'blind' to treatment and using validated outcome measures.…”