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#1. Scientists have discovered a new miracle drug that demonstrates a nearly 100 success rate in stopping all the effects of aging when tested on a population of mice. This result exhibits strong internal validity within the mouse population. If these scientists now wish to determine if this drug can be effectively used to achieve similar anti-aging results in humans, what primary concern related to the applicability of their findings should they address?
External validity refers to the degree to which the findings of an experiment can be generalized to other settings subjects or behaviors outside of the experimental conditions The text highlights that the drug has huge internal validity 100 success on multiple mice within the experiments controlled conditions However the primary concern when attempting to apply results from one species mice to another humans is whether the effects will generalize to a different population This question directly addresses the concept of generality or external validity Internal validity is concerned with whether the independent variable caused the change in the dependent variable within the specific study Sequence effects relate to the influence of one experimental condition on subsequent conditions which is not the core issue here Experimental control is the ability to demonstrate a functional relation between the independent and dependent variables which has been established for mice but needs to be evaluated for humans
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