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.
Questions
Student
Name
Total
Score (%)
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
0
0
0
0
1
1
Anita
30
0
1
0
0
0
1
0
0
1
0
1. Calculate the Difficulty Index (p) and the Discrimination Index (D). Ensure to use a new
table to show the upper and lower groups.
2. Answer the following questions:
a) Which question was the easiest?
b) Which question was the most difficult?
c) Which item has the poorest discrimination? discrimination – the lower students were
d) Which questions would you eliminate first (if any) – why?