WebMost items should be of middle difficulty. c. The items should run a continuous range from quite easy to quite difficult. d. About half should be rather easy; the other half should be rather difficult. B 15. What is the most serious problem if a test contains too many items that discriminate poorly? a. unreliability b. invalidity WebNov 25, 2013 · In classical test theory, a common item statistic is the item’s difficulty index, or “p value.”Given many psychometricians’ notoriously poor spelling, might this be due to thinking that “difficulty” starts with p?. …
Module 4C: Analyzing Item Difficulty and Discrimination
WebItem Analysis in a Nutshell. Check the effectiveness of test items: 1. Score the exam and sort the results by score. 2. Select an equal number of students from each end, e.g. top 25% (upper 1/4) and bottom 25% (lower 1/4). 3. Compare the performance of these two groups on each of the test items. WebE.g., if everyone chooses the correct answer the item is defined as easy; if 1 person in 100 answers it correct, the item is defined as difficult. Item difficulty = item-endorsement index in contexts where answer is not right or wrong (e.g., personality assessment) black woman abs
Difficulty Index, Discrimination Index and Distractor Efficiency …
Webitem difficulty index (p) How is the test item difficulty measured? 0- 1.0 What is the range of the value of P? moderate (p close to .50) In general what test items are retained in a test in terms of difficulty level? t/f .75 what is the exception of the .50 optimum level of the difficulty of an test item? item discrimination WebITEMDIFF(R1, mx) = item difficulty for the scores in R1 where mx is the maximum score for the item (default 1). ITEMDISC(R1, R2, p, mx) = item discrimination index based on the top/bottom p% of total scores (default .27) where R1 contains the scores for each subject for a single item, R2 contains the corresponding scores for all items and mx is ... Web104. The difficulty index of a test item is 1. This means that _____. a. The test is very difficult b. The test is very easy c. The test item is quality item d. Nobody got the item correctly 105. If the compound rage is low, this means that _____. a. The students performed very well in the test b. black woman activist jeremy vine