Test developers have at their disposal a number of statistical tools that may be applied when selecting items for use on a test.In Chapter 8's Meet an Assessment Professional,Dr.Scott Birkeland made reference to two such techniques.One was a measure of item discrimination,and the other was a measure of item
A) reliability.
B) utility.
C) difficulty.
D) variance.

Question

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Dr. Scott Birkeland mentioned two techniques for selecting test items: item discrimination and item difficulty. Item discrimination refers to how well an item can distinguish between high and low performers, while item difficulty pertains to the percentage of test-takers who answer an item correctly.

Test Developers Have at Their Disposal a Number of Statistical