Science Daily:

http://www.eurekalert.org/pub_releases/2015-09/vu-slo092415.php

http://www.sciencedaily.com/releases/2015/10/151001094607.htm

“This doesn’t mean that psychotherapy doesn’t work. Psychotherapy does work. It just doesn’t work as well as you would think from reading the scientific literature,” said Steven Hollon, Gertrude Conaway Vanderbilt Professor of Psychology, who co-authored the study with colleagues from Oregon Health & Science University, VU University Amsterdam and the University of Groningen.

This same publication bias has been previously demonstrated with respect to the study of Antidepressant efficacy.

“This study shows that publication bias occurs in Psychotherapy, mirroring what we’ve seen previously with antidepressants and other drugs,” said co-author Erick Turner, associate professor of psychiatry and pharmacology at OHSU School of Medicine, who directed the 2008 study of antidepressants.