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 (Joe, Dave, Sujie, Darrell, and Eliza are in the upper half). There are five students in the upper half and five students in the lower half. The number“1” indicates a correct answer on the question; a “0” indicates an incorrect answer.
 Student
Name	Total Score (%)	Questions	
		1	2	3	4	5	6	7	8	9	10	
Joe	100	1	1	1	1	1	1	1	1	1	1	
Dave	90	1	1	1	1	1	1	1	1	0	1	
Sujie	80	1	1	0	1	1	1	1	1	0	0	
Darrell	70	0	1	1	1	1	1	0	1	0	1	
Eliza	70	1	1	1	0	1	1	1	0	0	1	
Zoe	60	1	1	1	0	1	1	0	1	0	0	
Grace	60	0	1	1	0	1	1	0	1	0	1	
Hannah	50	0	1	1	1	0	0	1	0	1	0	
Ricky	40	1	1	1	0	1	0	0	0	0	1	
Anita	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 difficult?
3. Which item has the poorest discrimination?
4. Which questions would you eliminate first (if any) – why?