Question: Obtain the test characteristic curve for a test with ten items by setting all item difficulty parameters to a value of b D 0:0. The

Obtain the test characteristic curve for a test with ten items by setting all item difficulty parameters to a value of b D 0:0. The test characteristic curve in this case looks just like an item characteristic curve for an item with b D 0:0. The vertical axis ranges from 0 to 10. The mid true score occurs at an ability level of zero.

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