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Unit 3 Exercise Evaluating Test Items Items 1 through 4 show test items were part of midterm examination of an introductory psychology course. For each item calculate the diHiculty and discrimination of the item. Then evaluate and discuss the quality of the item, and what, if anything should be done with the item. The star (') indicates the correct answer. 1. Item 1 (5 points) The best guide that teachers can use to get a good idea of their students' academic ability is their students' a. Ethnicity. [3. Grade point average. c. Socioeconomic status. d. IQscore. a 'b ' c ' d Upper 2 16 ' 1 ' 1 ' Group Lower 1 9 ' 1 ' 9 ' Group Total 5 38 2 15