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By Duckworth and Milkman, in A Guide to Megastudies. Left panel: traditional field experiments randomly assign participants to multiple conditions (e.g., conditions A and B), testing a limited number of related hypotheses. Right panel: megastudies randomly assign participants to a larger set of treatments often clustered by sub-study (different colors indicate different sub-studies), each testing potentially unrelated hypotheses (e.g., conditions A, B, C, D, etc.) [44].
