A method of combining the results of many experiments, weighting each one in proportion to the number of participants, is

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Meta-analysis is a statistical method of combining the results of multiple studies to arrive at a more precise estimate of the effect size. It involves identifying all studies on a particular topic, extracting data on the effect size and its variance, and pooling the results together. The studies are weighted according to their precision (number of participants) to give more weight to studies with larger sample sizes. Factor analysis, transactional analysis, and transference are not relevant to this method.

A Method of Combining the Results of Many Experiments, Weighting