Glossary // Glossary term Technical
Meta-analysis
A statistical synthesis that combines effect sizes from multiple studies of the same question into a pooled estimate and examines how results vary between studies. When based on a systematic search and on controlled studies, it provides the strongest design-based evidence on this site. Its conclusions are limited by the quality of the included studies, by publication bias and by heterogeneity in methods and populations. Every public claim on this site with its type, evidence level, confidence, sources and review date, and an appraisal of each reference. How claims are graded, how art is kept apart from evidence, and how to report a problem. How one could reason about recording a catharsis-like change of state: signals, features, inference and context, baselines, self-report, error costs and ethics, and why every step stays uncertain. Nothing on this site measures anyone.Where the site uses it