KnowraRegression toward the meanLinked fromLinked fromThe 12 pages that link to Regression toward the mean, each with the reason it gives.All 12Broader topic 1Related 5Compared with 6Placebo effectCompared with: Much 'placebo improvement' in trials is this artifact, per critics of the effect.Law of large numbersCompared with: It concerns changes after extreme observations, not convergence of averages across growing samples.PlaceboRelated: Symptoms often prompt treatment at a peak, then ease regardless of the placebo.Francis GaltonBroader topic: Galton identified this pattern while comparing parents’ heights with their children’s.Regression analysisRelated: It is a statistical pattern often mistaken for change caused by an intervention.Simpson's paradoxCompared with: It explains changes in observed values over time, not reversals caused by aggregation.Norm-referenced testRelated: Extreme norm-referenced results often become less extreme on retesting, even without intervention.Control groupRelated: A control group helps reveal whether apparent improvement would occur without treatment.Gambler’s fallacyCompared with: Unlike the fallacy, regression concerns repeated measurements with shared causes, not independent events correcting themselves.Dunning–Kruger effectRelated: Statistical analyses show it can produce apparent skill-linked self-rating patterns.Flynn effectCompared with: It explains some changes across repeated measurements, but not persistent cohort gains across whole populations.27 ClubCompared with: A perceived run of deaths at one age need not continue or signal a stable risk.