About the Author

Ronald M. Doctor, Ph.D., is a professor in the Department of Psychology at California State University in Northridge. Ada P. Kahn holds a Ph.D. in public health and is the author of The Encyclopedia of Mental Health, Third Edition and The Encyclopedia of Stress and Stress-Related Diseases, Second Edition. She lives in Illinois. Christine Adamec is a medical writer with more than two dozen books and numerous medical articles to her credit. She has written The A to Z of Addictions and Addictive Behaviors for Facts On File and Checkmark Books. She lives in Florida.