This project is the latest in more than a decade of research into smokeless tobacco addiction by the investigators, who are behavioral scientists based at Oregon Research Institute in Eugene, Oregon. Previous studies by the same researchers have examined other approaches to smokeless tobacco cessation, including

The investigators are:

Herbert H. Severson, Ph.D. Dr. Severson is an internationally recognized expert in smokeless tobacco use and cessation. He has authored Enough Snuff, a 60-page quitting guide published by Applied Behavior Science Press; Smokeless Tobacco: A Deadly Addiction, published by Health EdCo; and numerous scientific articles in this field. He has contributed to three Surgeon General's reports on tobacco use and was a co-author of the 1994 Institute of Medicine report, Growing Up Tobacco Free. Dr. Severson was the director of the project.

Edward Lichtenstein, Ph.D. Dr. Lichtenstein has been a leader in the field of tobacco cessation for more than 30 years and is known for his early work in smoking cessation, as well as his more recent work in developing low-cost approaches to assisting people who want to quit smoking or smokeless use. Dr. Lichtenstein worked with the phone counselors in the original study.

Judy A. Andrews, Ph.D. Dr. Andrews' area of expertise is in research design, statistics, and evaluation. She has been involved with tobacco cessation research for over 11 years. Her interests include factors that lead to tobacco use and those that predict decrease in use or cessation. Dr. Andrews was responsible for analysis of the data collected from the participants.