“…Researchers have found that there are rapid, radical changes in clients with different types of psychiatric diagnoses in the first few sessions, and raised the possibility that a rapid response predicts long-term improvement in functioning as well as reduced recidivism (Bryan, Morrow, et al, 2009;Strosahl et al, 2012). In line with these results, the PCBH model has been shown to be effective in increasing the client's level of functioning in the case of various problems, including depression, stress, anxiety, and lifestyle concerns (e.g., Bryan, Corso, Neal-Walden, & Rudd, 2009;Roy-Byrne, Katon, Cowley, & Russo, 2001;Stein et al, 2011).…”