This page was discontinued in 2017. The best information I could find on the topic of addiction is here in Chapter 14 (Frontiers) in my online introductory textbook, Psychology: An Introduction, 2017 edition.
Write to Dr. Dewey at email@example.com.
Don't see what you need? Psych Web has over 1,000 pages, so it may be elsewhere on the site. Do a site-specific Google search using the box below.