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Title: A study is internally valid to the extent that: Post by: krisantiaaa on Feb 2, 2018 A study is internally valid to the extent that:
A) All alternative explanations of the results can be ruled out B) An experimental design was used C) Intervention fidelity was maintained D) A strong counterfactual was established Title: A study is internally valid to the extent that: Post by: Harley0507 on Feb 2, 2018 Content hidden
Title: Re: A study is internally valid to the extent that: Post by: bio_man on Jun 10, 2019 Internal validity is the extent to which it can be inferred that the independent variable is truly causing the outcome. Experiments (or randomized controlled trials, RCTs) involve an intervention (the researcher manipulates the independent variable by introducing an intervention; control (including the use of a control group that is not given the intervention and represents the comparative counterfactual); and randomization or random assignment (with participants allocated to experimental and control groups at random to make the groups comparable at the outset). Intervention fidelity helps to avert biases and gives potential benefits a full opportunity to be realized. A counterfactual is what would have happened to the same people simultaneously exposed and not exposed to a causal factor. The effect is the difference between the two. A good research design for cause-probing questions entails finding a good approximation to the idealized counterfactual.
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