Figure 3. Changes in Descriptive Normative Perceptions and Use of PBS over Time by Condition.
Note. CDI = computer-delivered intervention, PBS = protective behavioral strategies. Panel (a) represents descriptive normative perceptions for a typical student at the same institution (weekly drinking quantity), and panel (b) represents PBS use. Descriptive normative perceptions were targeted in both booster conditions, whereas PBS feedback was contained only in the norms-plus-PBS feedback booster condition.