CHAPTER III RESEARCH METHODOLOGY
A. Research Design
In conducting the research, the researcher used experimental research design. According
Ary et,al,
experimental research is the general plans for carrying out a study with and active independent variable. The design is important because it
determines the study‟s internal validity, which is the ability to reach valid conclusions about the effect of the experimental treatment on the dependent variable.
47
It means that experimental design is a research design that is used to find the influence of one
variable to another.
In this research, the researcher used quasi experimental research design. Quasi experimental design are similar to randomly experimental design in that they involve
manipulation of an independent variable but differ in that subjects are not randomly assigned to the treatment groups.
48
That is appropriate to this research‟s subject because this research‟s subject is in groups. So if the researcher randomly assigns the
students into the two groups, it would disrupt the classroom learning.
49
It means that in quasi experimental research the researcher does not randomly assign the students.
The researcher assigned the sample by taking randomly the class of the students, so it would not disrupt the classroom learning.
47
Donald Ary, Lucy Cheser Jacobs, and Chris Sorensen,
Introduction to Resea rch in Education,
Canada: Wadsworth, 2002, p.301
48
Ibid,
p.316.
49
Ibid,
p.309.
The variety of quasi experimental design can be divided into two main categories, they are post-test only control group, and pre-test post-test group design. In this
research, the researcher apply quasi-experimental pre-test post-test group design. The researcher assigned intact groups the experimental and control, administer a pre-test
to both groups, conducted treatment activities with the experimental group only, and the administered a post-test to assess the differences between the two groups.
50
The research design can be presented as follows:
G
1
= T1
X T2
G
2
= T1
O T2
Note: G
1
= Group one experimental class G
2
= Group two control class T
1
= Pre-test T
2
= Post-test X
= treatment by using Think Aloud Strategy O
= treatment by Guded Reading Strategy.
51
50
Ibid,
p.310.
51
Bambang Setiyadi,
Metode Penelitian untuk Pengajaran Bahasa Asing Pendekatan Kuantitatif dan Kualitatif,
Yogyakarta: GrahaIlmu, 2006, p.142.
B. Variable of The Research
Ac cording to Hatch “ Variable can be defined as an atribute of a person or an object
which “Varies” from person or from object to object”.
52
And also statetd that “ The independent variable is the major variable which is selected, manipulated and
measured by the research. The dependent variable, on the other hand, is the variable which you observe and measure to determine the effect
of the independent variable”
53
In this research, there are two variables investigated, they are as follows: 1.
The independent variable uses Think Aloud Strategy X 2.
Dependent variable is students‟ reading comprehension on recount text Y
C. The Operational Definition of Variables
The Operational Definition of Variables are as follow : 1.
Think Aloud strategy is a strategy that helps students to understand the reading, especially on recount text. It means that in this reasearch, the
researcher used Think Aloud as strategy in teaching reading comprehension on recount text.
2. The students, Reading comprehension on recount is the students knowledge
about how to comprehend the recount text. It means that they are able to understand about what they read.
52
Hatch Evelyn and Hossein Farhady,
Research Design Statistic
Los Angeles: New Burry House Publisher,1982, p.12.
53
Ibid
, P. 15.
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