SOLVED

21.An effective distracter should be selected by: a.at least some examinees and demonstrate positive discrimination. b.at least some examinees and demonstrate negative discrimination. c.no examinees and demonstrate zero discrimination. d.all examinees and demonstrate positive discrimination. 22.Item difficulty and distracter analysis are related to: a.Classical Test Theory. b.Factor Analytic Theory. c.Item Characteristic Curve Theory. d.Item Response Theory. 23.An Item Characteristic Curve is a graph with ____________ reflected on the horizontal axis and ______________reflected on the vertical axis. a.ability; probability of a correct response b.probability of a correct response; ability c.ability; probability of an incorrect response d.probability of an incorrect response; ability 24.The one-parameter IRT model assumes that items only differ in: a.the chance of a random correct answer. b.difficulty. c.discrimination. d.scree point. 25.The ___________ IRT model takes into consideration the possibility of an examinee with no ‘ability’ answering the item correctly by chance. a.one-parameter b.Rasch model c.two-parameter d.three-parameter 26.On an Item Characteristic Curve, the point halfway between the lower and upper asymptotes is referred to as the __________ and represents the difficulty of the item. a.medial apex b.modal beta c.beta index d.inflection point 27.__________ illustrates the reliability of measurement at different points along the distribution. a.Classical Test Theory b.Item Characteristic Curve c.Reliability Curve d.Test Information Function 28.In a class of 100 students, only 20 answered item 10 correctly. The p value for this item equals: a.0.20 b.0.40 c.0.64 d.0.80 29.For item 21, pT is 0.80 and pB is 0.30. What is the value of D for this item? a.0.20 b.0.25 c.0.50 d.0.70 30.The optimal p value for a selected-response item with two choices is approximately: a.0.55. b.0.65. c.0.75. d.0.85.