Multiplicative treatment effects in randomized pretest-posttest experimental designs.
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DOI: 10.1037/met0000222
Abstract: In randomized pretest-posttest experimental designs, experimental treatments are commonly compared through an additive difference. The assumed additive effects of experimental treatments, in randomized pretest-posttest design, also correspond to additive differences between pre- and posttreatment measures.… read more here.
Keywords: posttest experimental; randomized pretest; experimental designs; pretest posttest ... See more keywords