Graduate Students at a Local College Wanted to Predict the Probability

Graduate students at a local college wanted to predict the probability of success for each first-year student. During the summer, they developed a multiple choice test with 50 items based on interviews from first-year students at the end of the previous year. When they asked permission to give the test to this year's students, the dean asked for evidence of test reliability and validity. The graduate students replied the test showed a coefficient alpha of .92 and that the test had evidence of validity based on content. The dean replied that validity evidence based on content validity was not good enough. The dean asked them to submit a plan for gathering evidence of validity based on the tests relations with some external criteria. Provide a plan for a validation study that the graduate students can give to the dean.