An experiment is internally valid to the extent to which it
A) yields findings that are generalizable to a defined population.
B) uses valid measurement instruments.
C) controls for extraneous variables.
D) all of the above.

Question

Quizplus · Accepted Answer

Internal validity refers to the extent to which a study can demonstrate a cause-and-effect relationship between variables, which is primarily achieved by controlling for extraneous variables that could confound the results.

An Experiment Is Internally Valid to the Extent to Which