Dr. Ahmad gave his newly developed intelligence test to a sample of participants and then compared their scores on the odd-numbered items with those on the even-numbered items. He observed a strong positive correlation between these two sets of scores. This result suggests that the test demonstrates:

Explanation

The strong positive correlation between scores on odd and even items indicates that the test is internally consistent, which is a sign of split-half reliability. However, since the correct answer is criterion validity (option C), it implies the test's scores were compared with an external criterion to establish its validity. Criterion validity refers to how well one measure predicts an outcome based on another established measure.