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What is the advantage of a pretest-posttest control group design (presence of pretest and posttest, and treatment and control groups)?

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Happy nickie
20 June 2020
What is the advantage of a pretest-posttest control group design (presence of pretest and posttest, and treatment and control groups)?

What is the advantage of a pretest-posttest control group design (presence of pretest and posttest, and treatment and control groups)?

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phoebe_wing
20 June 2020

I am happy to share my knowledge. ^^

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Happy nickie
20 June 2020

Thank you.

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phoebe_wing
20 June 2020

A pretest-posttest control group design effectively deals with many threats to internal validity: History, maturation, instrumentation, statistical regression, selection, attrition, and testing.

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