You have just developed the ABC Test of History, which contains 100 items and tests a student’s knowledge of history. What kind of validity would you need for a test like this and how would you...

You have just developed the ABC Test of History, which contains 100 items and tests a student’s knowledge of history. What kind of validity would you need for a test like this and how would you establish it?

Among easy, difficult, or moderate, which type of test most accurately reflects the picture of an individual’s performance?