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. 2019 May 2;54(3):258–263. doi: 10.1093/alcalc/agz031

Fig. 2 Differences in the reported number of alcohol drinks consumed between the timeline followback (TLFB) and past-day self-reports across the monitoring only and treatment phases. Black squares indicate participants in the noncontingent Group, whereas white squares indicate participants in the contingent group. Error bars indicate standard errors. Participants in the contingent group significantly underreported the average number of drinks consumed each day during the monitoring only phase.

Fig. 2 Differences in the reported number of alcohol drinks consumed between the timeline followback (TLFB) and past-day self-reports across the monitoring only and treatment phases. Black squares indicate participants in the noncontingent Group, whereas white squares indicate participants in the contingent group. Error bars indicate standard errors. Participants in the contingent group significantly underreported the average number of drinks consumed each day during the monitoring only phase.