Early sudden gains in psychotherapy under routine clinic conditions: Practice-based evidence

William Stiles, Chris Leach, Michael Barkham, Mike Lucock, Steve Iveson, David A. Shapiro, Michaela Iveson, Gillian E. Hardy

Research output: Contribution to journalArticle

140 Citations (Scopus)


Sudden gains---large, enduring reductions in symptom intensity from one session to the next--were identified by T. Z. Tang and R. J. DeRubeis (1999) on the basis of data from 2 manualized clinical trials of cognitive therapy for depression. The authors found similar sudden gains among clients with a variety of disorders treated with a variety of approaches in routine clinic settings. Clients (N=135 who met inclusion criteria) completed short forms of the Clinical Outcomes in Routine Evaluation (CORE-SF) preceding 7 to 74 individual sessions. Those who experienced sudden gains within their first 16 sessions (n=23) had significantly lower CORE-SF scores in their final 3 sessions than did the other clients.
Original languageEnglish
Pages (from-to)14-21
Number of pages8
JournalJournal of Consulting and Clinical Psychology
Issue number1
Publication statusPublished - Feb 2003


Cite this