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Function: require_once
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Function: require_once
A true experiment has low internal validity ifThe researcher does not counterbalance all extraneous variablesExtraneous variables are allowed to vary systematically along with the levels of the independent variableThe study only includes ten-year-old children but the researchers want to apply the results to children of all agesThe researcher manipulated an independent variable qualitatively when they could have manipulated it quantitativelyAll of the statements described here are true about true experiments with low internal validity
