Therapist factor in the treatment of insomnia

This quasi-experiment attempted to replicate the finding of Turner and Ascher (1979) in contrasting progressive relaxation, stimulus control and paradoxical intention therapies for the treatment of insomnia using clinicians-in-training as therapists. Progressive relaxation and stimulus control were again shown to be effective, paradoxical intention instructions were not. A significant therapist effect was found which is discrepant with previous findings in the field.