out the effect of certain treatment on other.
1
And because the sample of this research is not selected randomly, the Quasi Experimental Design is used as
the design of this research. As stated by Creswell that when the sample of the research is not taken randomly, then the procedure is called quasi-experiment.
2
In order to find out whether or not the SQ3R method has the influence on students‟ reading comprehension, a Quasi Experimental Design is used in this
study. There are two kinds of designs in Quasi Experiment; Time Series Design and Nonequivalent Control Group Design.
3
In this case, the writer used Nonequivalent Control Group Design. The Nonequivalent Control Group
Design is a quasi-experimental research design where the treatment was given only to the experimental group, while the pre-test and post-test are given to
both of the control group and experimental group, and the control and experiment group are not selected randomly.
4
To be concluded, a quantitative method was used as a method for this research, while the design of the research was Quasi Experimental by using
Nonequivalent Control Group Design.
C. Population and Sample of the Research
1. Population
Population is a large group where the generalization of sample is established.
5
The population of this study was 427 10
th
grade students of SMAN 7 Tangerang Selatan which were divided into 10 classes start from X
IPA 1-XI IPA 6 and X IPS 1-X IPS 4.
2. Sample
Sample is a subset or smaller group of total population for the researcher to collect the data which have certain knowledge to become the
1
Sugiyono, Metode Penelitian Pendidikan, Pendekatan Kuantitatif, Kualitatif, dan RD, Bandung: Alfabeta Publisher, 2013, p.34
2
John W. Creswell, Research Design: Qualitative, Quantitative, and Mixed Method Approaches: Third Edition, USA: Sage Publication, Inc., 2009, p. 155.
3
Sugiyono., op.cit., p. 114
4
Ibid., p. 116
5
Donald Ary, Lucy Cheser Jaccobs, Chris Sorenssen, Introduction to Research in Education, Eigth Edition, USA: Wadsworth, Cengage Learning, 2010, p. 148.
representative of the population.
6
The sampling technique used in this research was purposive sampling; it is due to the writer‟s purpose in this
study which was to help the students ‟ with considered score in English to
get better reading comprehension, therefore the sample was taken purposively. As stated by Sugiyono, the purposive sampling is a technique
of sampling when the researcher has certain consideration for taking the sample which has certain condition that fit the aim of the research.
7
The sample of this research was 82 10
th
grade students from two classes; X IPA 2 which consisted of 41 students, and X IPA 4 which
consisted of 41 students. According to the suggestion from the English teacher who taught both classes, X IPA 4 was chosen to be the
experimental class which the treatment was given, while X IPA 2 was chosen to be the control group where the conventional reading method was
given.
D. Research Instrument
Test was used as the instrument of this research. There are two kind of test which was administered; pre-test and post-test. The pre-test which consisted of
20 multiple choice questions was done before the treatment was given; it is to measure students‟ basic reading skill. On the other hand, post-test which
consisted of 20 multiple choice questions was given after the treatment in order to see whether or not the treatment had given significant progress on
students‟ reading comprehension. The writer took the passages and questions for the test from google and several books of English for 10
th
grade such as Developing English Competencies for Senior High School which is written by
Achmad Doddy, Achmad Sugeng, and Effendi and Interlanguage: English for Senior High School Students X which is written by Joko Priyana, Virga
Renitasari, and Arnys Rahayu Irjayanti.
6
Louis Cohen, Lawrence Manion, and Keith Morrison, Research Methods in Education, Fifth Edition, Taylor Francis e-Library, 2005, p. 92.
7
Sugiyono, op. cit., p. 124
