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An experimental researcher selects students who had low scores on a math pre-test and high scores on a math post-test to participate in a study examining the influence of a new math curriculum in an elementary
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An experimental researcher selects students who had low scores on a math pre-test and high scores on a math post-test to participate in a study examining the influence of a new math curriculum in an elementary school grade. What potential threat to validity exists in the experiment?

User Nick Desaulniers
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Answer:

History

Step-by-step explanation:

The history of the students in relation to their mathematical skills is a potential threat to validity of the experiment.

User Dscoduc
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