2.1 Methodological Framework and Data Selection
The methodological architecture of this systematic evidence synthesis adopts a multi-tiered review protocol designed to capture the structural heterogeneity of digital media research. Evaluating digital exposure requires reconciling divergent operational definitions of social media usage across epidemiological and psychological literature. Following established synthesis standards for secondary reviews, this protocol implements an umbrella review paradigm to aggregate high-level meta-analytic and systematic findings across adolescent populations ("Social Media Use and its Impact on Adolescent Mental Health," 2021). Primary search protocols target indexed peer-reviewed literature across academic repositories, employing rigorous inclusion parameters centered on standardized measures of adolescent psychological wellbeing, identity negotiation, and peer interaction dynamics. To account for rapidly evolving platform architectures, the search framework applies a scoping review of reviews model ("Effects of Social Media Use on Youth and Adolescent Mental Health," 2025) alongside rapid systematic appraisal techniques ("Impacts of Social Media on Adolescent Mental Health," 2024). Methodological quality is systematically appraised across selected syntheses using standardized risk-of-bias frameworks, ensuring that causal claims remain distinct from cross-sectional correlational observations. Data extraction protocols categorize analytical dimensions into active engagement, passive consumption, and exposure to targeted algorithmic environments. By stratifying extracted evidence according to methodological rigor and outcome specificity, this synthesis constructs a robust framework capable of discerning how digital interaction patterns intersect with adolescent emotional wellbeing.