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Therefore, students number 1 to student number 15 were categorized as the upper group UG, students number 16 to number 30 were categorized as the
middle group MG, and students number 31 to student number 45 were categorized as the lower group LG. For the difficulty level analysis, the groups
of UG and LG were used to be analyzed. Then, to do the analysis of discriminating power of test, an index that shows
its ability to differentiate between pupils who have achieved well the upper group and those who have achieved poorly The lower group was used by the
writer.
D. Subject of the Research
The subject of the study was English summative test items at the first semester of 7
th
grade students of SMP Islam Annur Tanah Abang Jakarta academic year 20132014.
E. Instrument of the research
There were two instruments used in this research, they were: a.
English summative test The first instrument used in this research was the English Summative test at
odd semester from the first grade of Junior High School. The test analyzed was the English final test, and the total numbers of test items were 50 multiple choice
items. b.
Students’ answer sheets The students’ answer sheets were paper in which students gave their answers
that corresponds to the even English Summative test, 20132014 academic years.
F. Technique of Data Collecting
To collect the data based on the topic of the discussion, the writer analyzed the students’ answer sheet and the test paper of even English Summative test at
the second year students of at “SMP Islam Annur” Tanah Abang Jakarta Barat. To
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know which one of test items is qualified as a good test item, the writer used the formulation of difficulty level and discriminating power.
The step had been taken were:
G. Technique of Data Analysis
The technique of data analysis used in this research was quantitative and qualitative. She calculated the data by using simple percentage formula to
Taking summative test from school
Analyzed the test based test item analysis on difficulty level and discriminating power.
Analyze the result test revised or discarded
Explanation of Problematic Item
Explanation of Problematic Items Revised or Discarded.
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measure the difficulty level and discriminating power of each test item, and then analyzed the difficulty level and discriminating power of each test item.
She adopted the following formula to find out the difficulty level of each item in the last examinations English summative test for Junior High School level at
SMP Islam Annur Tanah Abang Jakarta Barat academic year 2013-2014:
DL : The index of difficulty level U : The number of students in the upper group who answered the item correctly
L : The number of students in the lower group who answered the item correctly
T :Total number of students in upper and lower group
1
To find out the difficulty level of all items in the last examinations English summative Test for Junior High School academic year 2013-2014, she used the
following formula:
P : Difficulty level of all items
B : Difficulty level of each items ∑ : Sigma total
N : Total number of the test item
1
Ngalim Purwanto, prinsip-prinsip teknik evaluasi pengajaran, Bandung Remaja Rosdakarya, 1986, p. 119.
DL = U + L
T
P = ∑b
N
