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CHAPTER III RESEARCH METHODOLOGY
A. Place and Time of the Study
The research conducted at first grade students of SMK YASPIA Jakarta which is located on Jalan Benda Gg. H. Saenan, Ciganjur, Jakarta Selatan.
The research was conducted in October – December 2013.
B. Method of the Study
This research is categorized as an experimentalal research. It focuses on treatment and outcome. It was proven the cause effect relationship among
independent variable and dependent variable. In this research, there were two class; experimental class and control class.
The experimental class was taught by using computer assisted language learning while the control class was taught without computer assisted language learning.
C. The Population and Sampling
In this research, the population was taken of the first year students of SMK Yaspia Jakarta. The total was 62 students from two classes. Before doing the
research, two classes was taken which had the same condition and had the same facilities. They also taught by the same teacher, in this case, the writer.
D. Instrument of The Study
The Instrument of research is test that divided into two tests, pre-test and post- test. Each of test consist of 15 items are multiple choice. Both of the classes,
experimental and controlled class were given the same test.
E. Technique of Data Collecting
Test was used in completing data. The test was done to find out the influence of language laboratory with computer in teaching listening skill. There
were two tests namely pre-test and post-test for the experimental and control class, both of them are named data. Pre-test was conducted when the writer
entered the class for the first time. The post test was done after the writer finished presenting the content of material. In post-test, the difference of the result among
experimental class and control class was showed.
F. Technique of Data Analysis
Data analysis is the last step in the procedure of research. In analyzing data from the pre-test and post-test, the statistical calculation of the T-Test was used
whether the sample is not related each other. T-test is used in order to find out the differences of the resultscore of stud
ent’s achievement in studying listening by using language laboratory.
1. Validity and reliability of instrument
In obtaining the validity of data, analysis technique by Karl Pearson was used; therefore it often called by Pearson correlation technique. The formula that
used is:
1
r
XY
= √
= correlation between variable X and Y X
= Questions’ score
Y =
Total of questions’ score n
= Number of students In determining reliability of data, Alpha Cronbach formula was used:
2
2 2
11
1 1
t i
k k
r
1
Anas Sudijono, Pengantar Statistik Pendidikan, Jakarta: Rajawali Grafindo Persada, 2010, p.206
2
Suharsimi Arikuno. Dasar-Dasar Evaluasi Pendidikan. Jakarta: Bumi Aksara, 2006, p.109.
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