Joseph Conducted an Experiment and Found That Participants Who Were

Multiple Choice

Joseph conducted an experiment and found that participants who were administered a supplement were less likely to contract the flu than those who were not. Irene criticizes the study, citing past experiments that have found null results. She says that the effect Joseph found was likely to be a false positive. Irene is essentially questioning what aspect of Joseph's study?

A) External validity
B) Construct validity
C) Internal validity
D) Face validity