The discrimination index of a test item is - 0.35. What does this mean?
A. More from the upper group got the item correctly.
B. More from the lower group got the item correctly.
C. The test is quite reliable.
D. The test item is valid.
A. More from the upper group got the item correctly.
B. More from the lower group got the item correctly.
C. The test is quite reliable.
D. The test item is valid.