ANALYZING THE TEST ITEMS IT DEALS WITH ITEM

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

ITEM DIFFICULTY DEFINITON FORMULA EXAMPLES

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 Item number High –scoring Low-scoring I II 10 8 10 3 III IV 6 8 4 5 V VI 2 0 VIII 7 4 3 6 IX X 6 10 4 0

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 = 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 Ø 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.

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