2. Test
The test was used to measure the students‘ vocabulary
mastery and students‘ reading ability on descriptive text. Each test consisted of 40 multiple choice items and every item had four
choices.
The test for examining the stude nts‘ vocabulary mastery
consisted of the following indicators:
Table 3.3 The Indicators of Vocabulary Mastery Test
The Measured
Aspects Indicators
Number of question
Total
Mastery of
word form
The ability to
decide the form of Comparative and
superlative Adjective
appropriately
The ability to
decide the form of verb appropriately
1, 2, 3, 4 5, 6, 27, 38
4
4
Mastery of word
meaning
The ability to give the meaning of a
word
The ability to decide the
antonym of a word
7, 8, 40 9, 10, 36, 37
3 4
Vocabulary knowledge
The ability to
decide the Adjective
appropriately
The ability to decide the verb
appropriately
The ability to decide the adverb
17, 18, 19, 20, 26, 29,
30, 33 16, 18, 34,
35 11, 12, 25,
28 8
4
4
word appropriately
The ability to
decide the noun of family
The ability to
decide the noun of occupation
The ability to
decide the noun of things around
us 21, 22, 23
13, 14, 15, 24, 31
32, 39 3
5
2
Total number of questions 40
Meanwhile, the test to measure the students‘ reading ability on Descriptive Text consists of the indicators as follows:
Table 3.4 The Indicators of Reading Ability on Descriptive Text Test
The Measured Aspects
Indicators Number of
Question Total
Understanding of the text literally
The ability to
remind and recognize
supporting details of the
text
The ability to
identify the information
of written text
The ability to
give the meaning of
word in the text
2, 5, 10, 14, 25, 26, 27,
28, 31, 32, 34, 39,
9, 15, 16, 17, 22, 23,
30, 35, 37, 38
8, 12, 24, 29, 36, 40
12
10
6
Understanding of the text
interpretatively
The ability to identify the
topic and main idea
The ability to
identify the reference
The ability to
make a conclusion of
the text 1, 3, 6, 11,
13, 19, 4, 20, 33
7, 18, 21, 6
3
3
Total of number of questions 40
O. Research Instrument Try Out
1. Research Variables
The variables that tested were: 1 Reading ability on descriptive text Y; 2 Reading Interest X1; and 3
Vocabulary mastery X2. 2.
Item test
The total of item test that was going to be tested consisted of: a.
The total of item test to measure the students‘ reading ability on descriptive text is 55 items of multiple choices.
b. The total of item test to measure students‘ reading interest
is 44 items of questionnaires. c.
The total of items test to measure students‘ vocabulary mastery is 65 items of multiple choices.
3. Place of Test
The test was conducted in SMPN 1 Banjar Pandeglang.
4. Samples of Test
a. The sample of test was conducted to the Eighth grade
students of SMPN 1 Banjar Pandeglang. b.
The total of sample was 30 students of the eighth grade excluding the population for testing X1 variable and 20
students for testing X2 and Y variable.
P. Research Instrument Try Out Procedure
1. Preparation
a. Before conducting the test. Firstly, the writer consulted to
the headmaster of SMP N 1 Banjar and asked the
permission to conduct the test on the selected students of the eighth grade.
b. The implementation of instrument test was conducted by
the help of other teacher to get the data. c.
Before the test, the respondents were given the instruction and explanation related with the test.
2. Implementation
The implementation of instrument test was conducted during 10 days. It began on the 3
rd
of June 2013 and lasted on 12
th
of June 2013. The test of students‘ reading interest and vocabulary mastery started on 3
rd
—4
th
of June 2013, whereas, the test of students‘ reading ability
on descriptive text is started on 10
th
–11
th
of June 2013.
3. Data Analysis
a. To test the validity of reading interest instruments, it used
Pearson Product Moment. Whereas the instrument of vocabulary mastery and reading ability on descriptive text
was tested by using item discriminating formula as follows:
U – L
D =_________ N
Note: D = Discriminating power U = Upper group who answer the item correctly
L = Lower group who answer the item correctly N = Total number of each group
The result can be seen from the following scale:
Table 3.5 Discriminating Power’s Scale
Discriminating Power Remark
0,6 – 1,0
0,4 – 0,6
0,1 – 0,3
-1 – 0,0
Very Good Good
OK Bad
In order to know the difficulty item, it could use the following formula
92
: R
P = ______ T
Note: P = Item of Difficulty R = Total number who answer the item correctly
T = Total number of students including upper and lower group
The remark of item difficulty can be seen from the following scale:
Table 3.6 Difficulty Item’s Scale
Item of Difficulty Remark
– 0,29 0,30
– 0,79 0,80
– 1,00 High
Medium Low
b. To test the reliability of reading ability on descriptive text
Y, reading interest X1, and vocabulary mastery X2, the formula of ―Kuder Richardson Formula 20 KR-20‖ that
was used as follows:
r
11=
[ ]
Note:
r
11 = Coefficient of reliability
k = the total of item test
SDt² = Standard deviation of total scores SDi² = Standard deviation of score item
92
John W. Oller, Language Test at School, London: Longman Group Limited, 1979, p. 247.
p = Proportion of total subjects who answer the item
correctly q
= 1 — p
Q. The Result of Research Instrument Try Out
