title: Therapist effects in guided internet-delivered CBT for anxiety disorders.
abstract: BACKGROUND
  Guided internet-delivered CBT for anxiety disorders has received increasing empirical support, but little is known regarding the role of the therapist.
  
  
  OBJECTIVE
  This study addressed therapist factors in guided internet-delivered cognitive behavioural therapy for anxiety disorders.
  
  
  METHODS
  Data from three controlled trials with a total N of 119 were analyzed with attention to differences between eight therapists.
  
  
  RESULTS
  No significant mean level differences between therapists appeared in the dataset. However, one significant intraclass correlation between participants was found, suggesting that the outcome on the Beck Anxiety Inventory might have been influenced by the impact of the individual therapists.
  
  
  CONCLUSIONS
  The therapist can possibly have some influence on the outcome of guided internet-delivered CBT for anxiety disorders, but studies with more statistical power are needed to establish whether therapist effects are present in this modality of psychological treatment. The present study was underpowered to detect minor therapist effects.
authors.affiliation: Linköping University, Sweden.
authors.forename: Jonas
authors.initials: J
authors.lastname: Almlöv
authors.forename: Per
authors.initials: P
authors.lastname: Carlbring
authors.forename: Karin
authors.initials: K
authors.lastname: Källqvist
authors.forename: Björn
authors.initials: B
authors.lastname: Paxling
authors.forename: Pim
authors.initials: P
authors.lastname: Cuijpers
authors.forename: Gerhard
authors.initials: G
authors.lastname: Andersson
mesh_terms: D000328:Adult; D001008:Anxiety Disorders / Q000175:diagnosis / Q000523:psychology / Q000628:therapy*; D015928:Cognitive Behavioral Therapy / Q000379:methods*; D005260:Female; D006801:Humans; D020407:Internet; D008297:Male; D008875:Middle Aged; D010043:Outcome and Process Assessment, Health Care; D016584:Panic Disorder / Q000175:diagnosis / Q000523:psychology / Q000628:therapy*; D010698:Phobic Disorders / Q000175:diagnosis / Q000523:psychology / Q000628:therapy*; D011369:Professional-Patient Relations; D016032:Randomized Controlled Trials as Topic; D013813:Therapy, Computer-Assisted / Q000379:methods*