5. Limitation and conclusion
The longitudinal data in the current study was solely based on self-reports from one source of informants and could benefit from more sources and methods of data collection. Triangulation with qualitative data from interviews and observations will be valuable for a clearer understanding of the parental mediation strategies. Additionally, practice effects are also present in longitudinal data. Students’ past experiences in the previous year may influence their responses in the test taken in the present year. However, the interval between the data collection points was around a year for this study, which may also diminish this effect. Despite these limitations, this study provides evidence with longitudinal data for the decline of active and restrictive mediation over time. Active and restrictive mediation are found to be practiced together when parents are involved in the monitoring of their youths' online behaviours. Additionally, these mediation strategies are found to be positively predictive of youths’ self-regulation and emotion regulation competencies, and negatively predictive of impulsivity; factors that are critical to reducing online risk and harm.