Half of the providers were assigned to the training program; the other half (the control group) took no special course. The researchers then looked at the results from a survey of up to 100 patients who had seen each provider over a 6-month period before the course and up to 100 of each provider's patients who had been seen during the 6 months after the course. The survey asked patients to rate seven of the provider's communication skills during a particular visit and their overall satisfaction with the care given by that provider. The providers who had taken the course were also asked how well they thought they communicated with their own patients, both before and after the course, and how useful they found the course.