TY - JOUR
T1 - Allegiance Bias and Therapist Effects
T2 - Results of a Randomized Controlled Trial of Binge Eating Disorder
AU - Wilson, G. Terence
AU - Wilfley, Denise E.
AU - Agras, W. Stewart
AU - Bryson, Susan W.
PY - 2011/6
Y1 - 2011/6
N2 - "Allegiance bias" has been hypothesized to compromise the findings of randomized controlled trials (RCTs). In contrast, our multisite RCT involving the collaboration of investigators with different allegiances regarding interpersonal psychotherapy (IPT), guided self-help cognitive behavior therapy (CBTgsh), and behavioral weight loss therapy (BWL) for binge eating disorder showed no evidence of any differential site×treatment effects. The findings indicate that "allegiance bias" does not necessarily occur in well-controlled RCTs with appropriate therapist training. We also examined the role of individual therapist differences that have been alleged to be more important than treatment effects. No individual therapist effects emerged on any measure in either IPT or CBTgsh, both of which were significantly more effective than BWL at two-year follow-up.
AB - "Allegiance bias" has been hypothesized to compromise the findings of randomized controlled trials (RCTs). In contrast, our multisite RCT involving the collaboration of investigators with different allegiances regarding interpersonal psychotherapy (IPT), guided self-help cognitive behavior therapy (CBTgsh), and behavioral weight loss therapy (BWL) for binge eating disorder showed no evidence of any differential site×treatment effects. The findings indicate that "allegiance bias" does not necessarily occur in well-controlled RCTs with appropriate therapist training. We also examined the role of individual therapist differences that have been alleged to be more important than treatment effects. No individual therapist effects emerged on any measure in either IPT or CBTgsh, both of which were significantly more effective than BWL at two-year follow-up.
KW - Allegiance bias
KW - Binge eating disorder
KW - Interpersonal psychotherapy
KW - Randomized controlled trial
KW - Therapist effects
UR - http://www.scopus.com/inward/record.url?scp=79958693815&partnerID=8YFLogxK
U2 - 10.1111/j.1468-2850.2011.01243.x
DO - 10.1111/j.1468-2850.2011.01243.x
M3 - Article
C2 - 25089079
AN - SCOPUS:79958693815
VL - 18
SP - 119
EP - 125
JO - Clinical Psychology: Science and Practice
JF - Clinical Psychology: Science and Practice
SN - 0969-5893
IS - 2
ER -