Fig. 6: Strategy for curating the sample of relevant articles.
From: A systematic review of worldwide causal and correlational evidence on digital media and democracy
a, Keywords included in our search query, run on Web of Science and Scopus, with logical connectors. Focus was on causal inference methods (method column), but also inclusion of descriptive quantitative evidence, relationships between digital media (cause column) and political outcomes (direct effect box) or content features (indirect effect box). b, Flowchart representing the stepwise exclusion process, starting with title-based exclusion, followed by abstract-based exclusion. c, Example illustration of outcome variable extraction from the abstracts. d, Breakdown of the most frequently reported political variables into top 10 categories. Numbers in brackets are counts of measurements in the set.
