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What is the “statistical regression” effect that may threaten internal validity?

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Leon 100
2020年5月11日
What is the “statistical regression” effect that may threaten internal validity?

Why would the method of “statistical regression” threaten internal validity?

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Tsz Ching
2020年5月19日

Welcome! =]

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Leon 100
2020年5月19日

Thank you.

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Tsz Ching
2020年5月19日

I want to clarify that the “statistical regression” here doesn’t mean the statistical models used in the evaluation. It refers to people’s tendency to perform on average in a population. In the context of program evaluation, participants with extreme scores at the pretest may tend to become less extreme at the post-test just because of their preference rather than the effect of the intervention.

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