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CHAPTER III RESEARCH METHODOLGY
This chapter presents the place and the time of the study, the method and the research design, the population and the sample, the research instrument, the
quality of instrument, the technique of data collecting, and the technique of data analysis.
A. The Place and the Time of the Study
This research was conducted at SMA Muhammadiyah 25 Setiabudi Pamulang located on Jl. Surya Kencana Pamulang Barat. The data
collected from that school began from 12 February 2014 until March 5
th
2014.
B. The Method and the Research Design
This research used quantitative method as a research method which the form of data is numerical and it was analyzed using statistics calculation.
The design of this research is aquasi-experimentaldesign in which the experimental group will be decided by which settings e.g. schools,
classrooms, and factories have volunteered or been selected to be part of the intervention. In this research, the two classes that used by the researcher have
already been selected by the teacher of English language subject.“Therefore, rather than randomly allocating, a control group is chosen that is as similar to
the experimental group as possible.”
1
During the implementation of the research, each class had two session, pre-test and post test session. Here is the description of the
research process:
1
Daniel Muijs, Doing Quantitative Research in Education, London:Athenaeum Press Ltd,. 2004p. 27
1. Pre-Test Session
On February 12
th
, the researcher scheduled to enter Class XI I IPS which was a control class. The researcher gave the explanation about
writing essay using power point and an example of essay for about 30 minutes. Then, the students are given one hour to write their essay. It is the
pre-test for control class. On Februari 21
st
, the researcher scheduled to enter Class XI I IPA which was an experimental class. The researcher did the same way like she
did in control class. The students are asked to write their essay which they could choose their own topic as long as it was analytical text.
2. Post-Test Session
In the next meeting, on February 28
th
, the students in experimental class were explained about how to use mind mapping in writing essay.
They are asked to make an essay using mind mapping. It is the post test of the research.
And the last session, on March 5
th
, the researcher reentered to the control class in order to ask them writing their second essay without using
mind mapping treatment. The researcher only gave the wider explanation about how to write an essay easily. Then, they were asked to do the post
test. Therefore, the whole process of this resarch took two meetings in every class.
C. The Population and the Sample 1. The Population
The population of this study is the students at the Eleventh Grade in Senior High School of Muhammadiyah 25 Pamulang. The total number
of population is 142 persons which is divided into four classes, they are class XI IPA I, class XI IPA II, class XI IPS II, and class XI IPS II
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