Skip to main content
Validity of Sudden Gains in Acute Phase Treatment of Depression
Journal of Consulting and Clinical Psychology (2005)
  • Lee Anna Clark, University of Iowa
  • Jeffrey R Vittengl

The authors examined the validity of sudden gains identified with T. Z. Tang and R. J. DeRubeis's (1999) method in 2 clinical data sets that involved treatment of major depressive disorder (N=227). Sudden gains replicated among self- and clinician reports of depressive symptoms and predicted better psychosocial functioning at the acute phase treatment end point, in support of their validity. However, sudden gains occurred with roughly the same moderate frequency in pill placebo and pharmacotherapy with clinical management as in cognitive therapy. Furthermore, sudden gains predicted more depressive symptoms and negative failure attributions in longitudinal follow-up of responders to acute phase cognitive therapy. On the basis of these findings, the authors conceptualize sudden gains as one of several possible patterns of acute phase treatment response. (PsycINFO Database Record (c) 2009 APA, all rights reserved)

Publication Date
February, 2005
Citation Information
Lee Anna Clark and Jeffrey R Vittengl. "Validity of Sudden Gains in Acute Phase Treatment of Depression" Journal of Consulting and Clinical Psychology Vol. 73 Iss. 1 (2005)
Available at: