Which of the following is the best example of a test that is both reliable and valid?
A)
Dr. Square administers the same test every day for a week to the same individuals and notices that the results improve across the week, a result consistent with class performance in past years.
B)
Dr. Circle administers a French-language test twice to individuals and finds differences in scores between subjects with better performance on the second test, a result consistent with studies on language acquisition.
C)
Dr. Triangle administers 2 versions of an advanced human anatomy test, with all students completing both versions, and finds similar grades on both versions with non-anatomy students performing equally well as anatomy students.
D)
Dr. Oval administers a monthly general stress test in a control group of subjects and finds that stress levels remain unchanged, consistent with physiological measures of stress hormones.
Answer: D