CHAPTER III
METHODOLOGY
3.1
The Research Design
In this research, the writer uses
pre – experiment method. It’s only uses one group. The design in this pre –
experiment is a free test, it is the first step how to treatment. The design in
pre – test. The group will be designed
as follows:
Pree Test Treatment Post Test
3.2
The Population of Sample
3.2.1
Population
In conducting the research and collecting
the data to be investigated, the writer chose the 7th grade learners
(Class 7th A,B,C and D) of Islamic Junior High School (M.T.s) Darul
Huda at Pakuwon Cisurupan of Garut regency. The totals of the population were
120 students.
3.2.2
Sample
To determine the repetitive sample of this
research, the writer purposively selected 40 of 120 students.
3.3.3 The Procedure of
Collecting the Data
The writer will
calculate the data about mapping ideas’ for students’ speaking ability.
To produce the data,
the writer has done some steps of research as follow:
3.3.1 Observation
In the observation, the writer
wanted to know the condition of the sample.
3.3.2 Pre – Test
The writer gave the pre – test to measure
every students speaking ability based on the mapping.
3.3.3 Collecting Pre –
Test
The
writer collected the scores of pre – test from the sample
3.3.4
The writer was teaching mapping ideas for students’ speaking ability by
using various activities (Group
work, pair work etc.)
3.3.5 Collecting the
scores of the post - test
The writer has
collected the score of the post – test.
3.3 Analyzing the Data
In analyzing the data,
the writer used statistical data analysis. The kind of the data statistic that
the writer used is match samples. It is intended to test for a significant
difference between of two samples.
The type of analysis, the writer can
cultivate the performance of the population based on the investigation of
sample and test hypotheses.
In justifying mapping ideas for
students speaking ability, the writer used the matching of sample technique.
The formula is
T= D
S
Note :
t : Significance level
D : the different between post – test
and pre – test
n :
the number of sample
s : Standard deviation for difference between pre – test and post –
test
3.4.1 Computing the
scores pre and post- test
1)
The counting scores pre
– test to get (X)
2)
The scores post – test
of the students in order to get (y)
3)
The number of students
to get (n)
4)
The total number of the
scores (x) for 
5)
The total number of the
scores (y) for 
6)
In order to find out
the pre – test and post – test the total of scores were divided by the number of the subjects, applying the
formula bellow:
a. Means 
= and mean 
= and mean
7)
Counting D, it means 
8)
Counting D2, it
means 
9)
The total of score 
10)
The total of the
score 
11)
The total of the score
D was divided by the number of the subject
12)
To get standard
deviations, the writer counted the standard deviation by using the formula:
n – 1
13)
After counting the standard
deviations, the writer counted t observes by using the formula
D 
S
14)
And then the writer found
out the t critical on the level of significance 0,5 for one tailed test from
the table 4 with df.
15)
The last was to compare the
value of t observed with the t critical listed on significance.
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