2.1 Review Protocols and Methodological Rigour
To establish an evidence base regarding the psychological consequences of digital platform engagement, this study implements a rigorous systematic review protocol aligned with internationally recognized reporting standards. Synthesizing evidence across disparate digital health domains requires a multi-tiered screening framework that isolates specific affective, behavioral, and developmental indicators without conflating passive media consumption with interactive platform engagement. In evaluating adolescent mental health trajectories, systematic review protocols provide the necessary structural containment to examine complex psychological correlates, including identity development and acute behavioral distress (crossref-10-21275-sr25304094625; pubmed-39621632). Furthermore, adopting an umbrella review design facilitates the critical appraisal of existing meta-analyses and systematic reviews, thereby resolving conflicting empirical findings across heterogeneous adolescent cohorts (crossref-10-31234-osf-io-y8zdg). The methodological framework applies predefined eligibility criteria, systematic quality assessment rubrics, and standardized data extraction procedures to evaluate the validity of documented associations between online platform mechanics and adolescent wellbeing outcomes. By enforcing these methodological constraints, the synthesis mitigates publication bias and ensures that subsequent thematic analyses reflect robust evidentiary standards suitable for guiding Australian policy and clinical frameworks. This methodological posture ensures that varied operationalizations of digital media engagement are systematically cataloged, critically weighed, and integrated without obscuring confounding socio-environmental determinants.