The design of this study is a randomized (modified) waiting list controlled study. Subjects will be recruited via a random digit dialing telephone screener of the Ontario population. Respondents who are identified by the screener as problem gamblers and who indicate an interest in receiving, at some time in the future, a free computerized summary comparing their gambling to that of other Canadians, will be asked if they will take part in a study to "help us develop and evaluate self-help materials for gamblers." They will be told that the materials and the three-, six- and 12-month follow-up surveys would be mailed to them. Compensation is provided for the completion of each survey.