@article{954d49af43ad48919214fc522c54fa15,
title = "Reliability of Therapist Effects in Practice-Based Psychotherapy Research: A Guide for the Planning of Future Studies",
abstract = "This paper aims to provide researchers with practical information on sample sizes for accurate estimations of therapist effects (TEs). The investigations are based on an integrated sample of 48,648 patients treated by 1800 therapists. Multilevel modeling and resampling were used to realize varying sample size conditions to generate empirical estimates of TEs. Sample size tables, including varying sample size conditions, were constructed and study examples given. This study gives an insight into the potential size of the TE and provides researchers with a practical guide to aid the planning of future studies in this field.",
keywords = "Therapist effects, Naturalistic data, Multilevel analysis, Sample size, Practical guide",
author = "Anne-Katharina Schiefele and Wolfgang Lutz and Michael Barkham and Julian Rubel and Jan B{\"o}hnke and Jaime Delgadillo and Mark Kopta and Dietmar Schulte and David Saxon and Nielsen, {Stevan L.} and Lambert, {Michael J.}",
note = "{\textcopyright} Springer Science+Business Media New York 2016. This is an author-produced version of the published paper. Uploaded in accordance with the publisher{\textquoteright}s self-archiving policy. Further copying may not be permitted; contact the publisher for details",
year = "2017",
month = sep,
doi = "10.1007/s10488-016-0736-3",
language = "English",
volume = "44",
pages = "598--613",
journal = "Administration and Policy in Mental Health and Mental Health Services Research",
issn = "0894-587X",
publisher = "Springer New York",
number = "5",
}