The document discusses the procedures for item analysis when evaluating test scores. It defines the index of difficulty, index of discrimination, and measure of attractiveness which are used to determine the desirability of test items. Specifically, it provides the formulas for calculating the index of difficulty, index of discrimination, and measure of attractiveness based on responses from the top and bottom 27% of students.

2. • At the end of the semester, the students will be able to know the
following:
 The procedures in Item Analysis
 Computation for the Index of Difficulty and Index of
Discrimination
 Interpreting the Test Scores

3. • 3 Criteria Determining the Desirability of an Item:
• 1. Difficulty of an Item. ( How difficult the item is.)
• 2. Discriminating power of an item (+/-)
• *positive disc= Pu > PL
• 3. Measure of Attractiveness (+/-)
• (Determines how attractive is the distractor)
• *keyed response=correct answer
• *wrong options= distractor
• *effective distracters= more students in lower group chose it than the upper
group.

4. 2.Arrange the scores from highest to lowest.
3.Separate the top 27% and the bottom 27%
4.Find the proportion of each score. (frequency/the 27%)
Then solve for this:
*Index of Difficulty: *Index of Discrimination:
Df= (Pu+PL)/2 Ds= Pu-PL
*Measure of Attractiveness *where:
Da= Pu-PL/St Pu= upper class
PL=lower class
St= number of students

5. • Discriminating Index
• .40-up= very good item(accept)
• .30-.29= reasonably good item but subject for revision
• .20-.29= marginal item (revise)
• Below-.19= poor item (reject)
• Range of Difficulty
• 0.00-0.20 – Very difficult
• 0.21-0.40 – Difficult
• 0.41-0.60 – Moderately difficult
• 0.61-0.80 – Easy
• 0.81-1.00 – Very easy