dr. candace peterson, associate scientist, evaluation shared service, university of wisconsin population health institute, madison, wisconsin. dr. clark, what does research to practice mean and what does it mean for a methodology or a practice to be evidence-based? research to practice is a concept that captures the evolvement in the research community with regard to various aspects of, in this case, substance abuse or mental health care in an effort to increase the ability to positively affect the individual who's affected by it. so, evidence-based, then, is mobilizing administrative, clinical, and research information to enhance the quality of care and the effectiveness of care in order to produce the best outcomes associated with providing care, so when people present for care they're getting the best care possible. and, tom, in the field, how much of this is going on? what is the percentage of people that actually do evidence-based practice? well, it's a good question. as dr. clark said, nobody can argue that you need more evidence for the things that you do. every parent demands it f