When a researcher claims that the results of a test market in Indianapolis,Indiana will hold in a national rollout of the new product,this researcher is claiming ____.
A)internal validity
B)the repeated measures effect
C)constant error
D)external validity

Question

Quizplus · Accepted Answer

The researcher is claiming external validity, which is the extent to which the results of a study can be generalized to other populations or real-world settings beyond the specific study. The researcher is asserting that the results from the test market in Indianapolis will hold for a national rollout, indicating a desire to apply the findings beyond the specific context of the original study. Internal validity pertains to the extent to which a study's findings are a result of the independent variable, while the repeated measures effect and constant error are specific phenomena that can impact research results.

When a Researcher Claims That the Results of a Test