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There are 7 threats to internal validity which are history, maturation, testing, instrumentation, statistical regression, selection, and experimental attrition. Can you provide 3 examples of

There are 7 threats to internal validity which are history, maturation, testing, instrumentation, statistical regression, selection, and experimental attrition.

Can you provide 3 examples of threats to internal validity?

& for each example, explain why the independent variable might not produce changes in the dependent variable.

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