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ITEM ANALYSIS WORKSHEET

Ten students have taken an objective assessment. The quiz contained 10 questions. In the table

below, the students’ scores have been listed from high to low (David, Tommy, Dennis, Sara, and

Johnny are in the upper half). There are five (5) students in the upper half and five students (5)

in the lower half. The number “1” indicates a correct answer on the question, a “0” indicate an

incorrect answer.

Student Name

Total Score

(%)

Questions

1 2 3 4 5 6 7 8 9 10

David 100 1 1 1 1 1 1 1 1 1 1

Tommy 90 1 1 1 1 1 1 1 1 0 1

Dennis 80 1 1 0 1 1 1 1 1 0 0

Sara 70 0 1 1 1 1 1 0 1 0 1

Johnny 70 1 1 1 0 1 1 0 1 0 0

Tammy 60 1 1 1 0 1 1 0 1 0 0

Grace 60 0 1 1 0 1 1 0 1 0 1

Mary 50 0 1 1 1 0 0 1 0 1 0

Darrell 40 1 1 1 0 1 0 0 0 0 1

Jeanette 30 0 1 0 0 0 1 0 0 1 0

Calculate the Difficulty Index (p) and the Discrimination Index (D) for each question.

Item #Correct (Upper Group)

# Correct (Lower Group)

Difficulty (p) Discrimination (D)

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Answer the following questions:

1. Which question was the easiest?

2. Which question was the most difficulty?

3. Which item has the poorest discrimination?

4. Which questions would you eliminate first (if any) – Why?