employing conventional
way employing
auditory sensory
preferences
7. Teaching
verbs by employing
conventional way
Teaching verbs by
employing kinesthetic
sensory preferences
24, 26, 37, 38, 39
5
8. Teaching
adverbs by employing
conventional way
Teaching adverbs by
employing visual sensory
preferences 29, 30
2
9. Teaching
adverbs by employing
conventional way
Teaching adverbs by
employing auditory
sensory preferences
27, 28, 49, 50 4
Total of Items 50
To get a valid and reliable instrument, the test was tried out. The tryout of the test
was done before the instrument was used in the research. The try-out of the instrument was carried out in the first grade students of SMP Negeri 3 Pekuncen,
Banyumas. The results of try out can be seen in the Appendix. After finishing the try-out, it is found that there are fifty valid and reliable items.
1. The Validity of the Test
The data resulted would be valid if the instruments used are also valid, and a test would be reliable if it is constant, or it is reliable if the results of test
show their constancy. Suharsimi Arikunto 1978: 160 states that the instrument is valid if it
measures what it is supposed to measure. For example, a researcher would like to measure the vocabulary mastery by using an instrument in the form of multiple
choice test items, so, the items inside have to reflect the content of its vocabulary mastery.
In computing the validity of the test, the researcher used” Product Moment Correlation” of Ngalim Purwanto 1985:141, namely:
in which:
group second
of Deviation
Standard of
Square The
group first
of Deviation
Standard of
Square The
group second
of Deviation
Standard group
first of
Deviation Standard
up sum
or up
add
2 2
= =
= =
= Σ
=
ι ι
ι ι
y x
y x
To Validity
r
After the researcher analyzes the result of by using Product Moment Correlation,
the researcher found the results as follows: Number
Classifications Number of Items 1.
Valid 1, 2, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17,
18, 20, 21, 23, 24, 25, 26, 27, 28, 30, 31, 34, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 50, 51, 52, 53,
55, 56, 57, 58, 59, 60 2.
Invalid 3, 19, 22, 29, 32, 33, 35, 48, 49, 54
2 2
ι ι
ι ι
y x
y x
r Σ
Σ Σ
=
2. The Reliability of the Test
According to Ngalim Purwanto 1985: 138 reliability is the consistency of the instrument. The instrument is reliable if it is believable, consistence or
stable and productive as well. To find out the reliability value of test instrument, researcher uses KR-21Kuder- Richardson formula, it is as follows:
In which:
p q
p S
n
t
− =
= =
=
1 items
of number
a by
divided is
Mean tests
all of
Deviation Standard
test in the
items of
number A
The results of reliable and valid of try-out test instrument can be seen in Appendixes. It shows there are 50 valid and reliable items. Furthermore,
researcher used this valid and reliable test instrument to have pre and post test for experimental and control group after the researcher had calculated this. The pre-
test used is to know the homogeneity of students. The test material of the pre-test has to be the same as the material of the post-test. The subjects of research must
be homogeny. Based on the results of the pre-test gained by the two groups control and experiment group, all participants had variety mark, so the
researcher calculated and took only some students from each group who got the
− −
=
2 2
1
t t
S q
p n
S n
n r
same ability. At last, there are totally 42 students, who get mark in the range of 64- 70 from each group, 21 students are from control group and the other ones are
from experimental group. Then researcher divides groups into two, they are experimental and control group, 21 students for experimental group and 21 for
another. The experimental group is treated by using sensory preferences learning style and not for another group.
F. Technique of Data Analysis
