IT DEALS WITH ITEM DIFFICULTY ITEM DISCRIMINATION

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Published 2026-08-14 · 11 slides · 0 views

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IT DEALS WITH ITEM DIFFICULTY ITEM DISCRIMINATION

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IT DEALS WITH ITEM DIFFICULTY ITEM DISCRIMINATION EFFECTIVENESS OF DISTRACTORS ANALYZING THE TEST ITEMS ITEM DIFFICULTY ITEM DIFFCULTY DEFINITION: The difficulty of an item is defined as the percentage of students passing. OR The

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IT DEALS WITH
ITEM DIFFICULTY
ITEM DISCRIMINATION
EFFECTIVENESS OF DISTRACTORS ANALYZING THE TEST ITEMS

ITEM DIFFICULTY

ITEM DIFFCULTY DEFINITION:
The difficulty of an item is defined as the “percentage of students passing.”
OR
The percentage of students who got the item right.

FORMULA OF ITEM DIFFCULTY Formula:
P=H+L/N(100)

P=index of item difficulty.
H=number of students in high-scoring group who got the item right.
L=number of students in low-scoring group.
N =total number of students.

TABLE OF INDEX / ITEM NUMBER

EXAMPLE OF AVERAGE ITEM Formula:
P= H+L/N(100)
P= 6+4/20(100)
P= 10/20(100)
P= 0.5(100)
P= 50%
This percentage show that item is not easier or not difficult.

EXAMPLE OF EASY ITEM Formula:
P = H+L/N(100)
P = 10+10/20(100)
P = 20/20(100)
P = 1 (100)
P = 100
That an item is 100% difficult we mean that the item is so easy that all the students got it right.

EXAMPLE OF THE MOST DIFFICULT Formula:
P = H+L/N(100)
P =2+2/20(100)
P = 4/20(100)
P = 0.2(100)
P = 20%
This show that item is so difficult ,if the item is 0% percent difficult we mean that the item is so difficult that not a single student got it right .

WHY USE ITEM DIFFICULTY To check the difficulty level of item.
To know the student understanding.
In the beginning of the test 100% difficulty is motivated the student to attempt the test.
Teacher are conform to the desired level of difficulty by including easier or more difficult items.

QUESTIONS

THANK YOU

IT DEALS WITH ITEM DIFFICULTY ITEM DISCRIMINATION

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