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Title: Which design not only controls all threats to internal validity but also controls the effect of ... Post by: YINGW on Feb 2, 2018 Which design not only controls all threats to internal validity but also controls the effect of pretest/posttest scores?
1. Nonequivalent control group design. 2. Solomon four-group design. 3. Posttest only control group design. 4. Pretest/Posttest control group design. Title: Which design not only controls all threats to internal validity but also controls the effect of ... Post by: hennihanadi on Feb 2, 2018 2
Rationale 1: The nonequivalent control group design is similar to pretest/posttest control group design. Selection bias as a threat to internal validity is present as no random assignment to groups occurs. Rationale 2: The Solomon four-group design is considered the most prestigious design because it minimizes threats to internal and external validity and controls the reactive effect of the pretest. Rationale 3: In a pretest/posttest control group design, the threats to internal validity are controlled, but the threat to external validity of reactive effects of a pretest exists. The posttest design is used when a pretest is not possible. Rationale 4: In a pretest/posttest control group design, the threats to internal validity are controlled but the threat to external validity of reactive effects of a pretest exists. Title: Which design not only controls all threats to internal validity but also controls the effect of ... Post by: YINGW on Feb 2, 2018 So that's it? I just the answer and what's in it for you?! Any way, I'm not complaining
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