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11.What is the approximate optimal Item Difficulty Index for a multiple-choice item with 4 choices? a.0.0 b.0.25 c.0.50 d.0.75 e.1.0 12.A general recommendation is to use items with p values that have a range of approximately _________ around the optimal value. a.0.05 b.0.10 c.0.15 d.0.20 e.0.25 13.While the item difficulty index is only applicable for _____________, the percent endorsement statistic can be calculated for ____________. a.maximum performance tests; constructed-response tests b.maximum performance tests; typical-response tests c.typical-response tests; constructed-response tests d.typical-response tests; maximum performance tests 14.On a reading comprehension exam, the proportion of examinees in the top group that answered item 5 correctly equaled 0.70 and the proportion of examinees in the bottom group that answered item 5 correctly equaled 0.10. What is the discrimination index for item 5? a.0.36 b.0.49 c.0.60 d.0.80 15.When a test item has a discrimination index ______, it is considered to be acceptable by the chapter authors. a.greater than 0.30 b.less than 0.30 c.greater than 0.60 d.less than 0.60 16.A test item with a p = .70 and D = .45 is: a.relatively easy and discriminates well. b.relatively easy and does not discriminate well. c.relatively difficult and discriminates well. d.relatively difficult and does not discriminate well. e.of intermediate difficulty and does not discriminate well. 17.A test item with a p = .30 and D = .15 is: a.relatively easy and discriminates well. b.relatively easy and does not discriminate well. c.relatively difficult and does discriminate well. d.relatively difficult and does not discriminate well. e.of intermediate difficulty and does not discriminate well. 18.A test item with p = .80 and D = .40 is: a.relatively easy and discriminates well. b.relatively easy and does not discriminate well. c.relatively difficult and does discriminate well. d.relatively difficult and does not discriminate well. e.of intermediate difficulty and does not discriminate well. 19.A test item with p = .50 and D = .40 is: a.relatively easy and discriminates well b.relatively easy and does not discriminate well. c.relatively difficult and does discriminate well. d.relatively difficult and does not discriminate well. e.of intermediate difficulty and discriminates well. 20.In a class of 100 students, 70 answer item #4 correctly and 30 answer it incorrectly. What is the p value of this item? a.0.30 b.0.40 c.0.49 d.0.70

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