Based on our previous Promoting Self-Change study, we will conduct a randomized controlled trial consisting of three groups and designed to tease apart alternative possible explanations of mechanisms of behavior change within a community based mail intervention. In particular, the study will investigate the timing of points of inflection (i.e., change) in participants' reported drinking as they participate in the study. The three experimental groups will differ in whether they receive a message informing them that self-change is a common phenomenon (two groups will receive the message, one will not) and the occasion when the message is delivered (when consenting to the study and before the assessment vs. with the intervention material). This design allows the following 5 objectives to be addressed: