“…Computer-or internet-based mental health interventions have been shown to produce improvements in panic disorder (Carlbring et al, 2005;Carlbring, Westling, Ljungstrand, Ekselius, & Andersson, 2001;Klein & Richards, 2001;Klein, Richards, & Austin, 2006;Richards & Alvarenga, 2002), agoraphobia (Alcañiz et al, 2003), depression (Christensen, Griffiths, & Jorm, 2004a;Christensen, Griffiths, Korten, Brittliffe, & Groves, 2004b;Proudfoot et al, 2003), PTSD (Lange et al, 2003;Lange, van de Ven, Schrieken, & Emmelkamp, 2001), social phobia (Andersson et al, 2006;Botella et al, 2007;Carlbring, Furmark, Steczko, Ekselius, & Anderssen, 2006;Carlbring et al, 2007), and specific phobia (Bornas et al, 2001;Bornas et al, 2002;Botella et al, 2008). In a recent meta-analysis of the effects of internet and computer-based cognitive-behavioural treatments in the treatment of anxiety disorders, it was concluded that computer-based treatments were superior to waitlist or placebo controls groups with effect sizes (Cohens d) ranging from 0.49 to 1.14 (Reger & Gahm, 2009).…”