Fig 1.
Timeline of the study.
Fig 2.
Flowchart for the categorization of prospective change in self-reported measures.
Nota bene: the legend corresponds to changes measured using both frequency and quantity (i.e., smoking, video gaming, internet pornography use, and TV series and movie watching). The decisional procedure is the same for binge drinking and cannabis use that are measured only in frequency, though no ratio calculation is needed to differentiate increase, decrease and stability.
Table 1.
Contingency table for identifying inconsistency in change measures.
Table 2.
Sample information.
Table 3.
Logistic regressions models for inconsistency between retrospective and prospective change measures.