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

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Leon 100
2020年5月2日
What is the “attrition” effect that may threaten internal validity?

What is “attrition”? How does it affect internal validity?

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Tsz Ching
2020年5月5日

Welcome! =]

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Leon 100
2020年5月5日

Thank you.

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Tsz Ching
2020年5月5日

It refers to the loss of participants owing to dropping out. It can lead to attrition bias and impact the correlation between the variables. Attrition bias can skew a well-designed experiment’s results, making variables show suspicious correlations when they are not and vice versa.

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