Y
1
= Pretest of both experimental and control group Y
2
= Posttest of both experimental and control group X
= Implementation of REAP Technique
1
C. The Population and Sample
1. Population
The population of this study is the first grade student of MTs Salafiyah which consists of 180 students and divided into 4 classes; class VII.1, VII.2,
VII.3, VII.4.
2. Samples
The sampling technique of this research is Purposive Sampling. It is purposive because the sampling is determined by certain considerations.
2
The sample was 60 students from two classes; VII.1 and VII.4. The writer
implemented without REAP technique in the first class VII.1 and REAP technique was implemented in the second class VII.4. Before the writer
conducted the research, she made sure that both classes have the same characteristic by doing a pre observation. She observed the teaching and learning
process in the classroom once and she saw the students‟ reading score from their real teacher. It was found that the students from both classes have the same
characteristic. The sample of this study is a class VII.1 as a control class and VII.4 as experimental class which each class consist of 30 students.
D. The Instrument of The Research
The Instrument of the research is a test. The test was multiple choices. It was consist of 40 items which is designed not only validity but also reliability.
Before the test is applied, the 40 items of the tests was tested first toward students of second grade to know its validity and reliability. The validity and reliability test
1
Larry B. Christensen, Experimental Methodology, Alabama: University of South Alabama, 2007 , p. 332
2
Sugiyono. Metode Penelitian Pendidikan. Bandung: Alfabeta, 2012, p. 124
was analyzed by using software ANATES. The content validity of the test item will be compared with the cur
riculum. It answered “Does the 40 tests items represent all the course objective
s as stated in the curriculum?”
E. The Technique of Collecting Data
To obtain the data, the technique that used in this research was a method of test, there were pretest and posttest. Pretest conducted to determine the ability
of student learning outcomes early in the subjects of English language students before treatment. This test is used to determine their reading skill in descriptive
text. This test was given to the control class and experimental class of first grade students of MTs Salafiyah. The test consists of some questions in multiple choices
about descriptive text. It is necessary to do this test because the writer will compare the pretest data and the posttest data. Furthermore, after the treatment,
the writer will give them the posttest. Posttest is performed to measure the acquisition of learning outcomes at the end of the treatment.
F. Internal Validity Control
The instrument of this research is a test. Before the writer used this instrument to the students as the sample of the research, the writer tested the
instrument to the eight grade students of MTs Salafiyah. In this case, the writer tested the instrument in class VIII.2. There are 40 students in this class who did
the validity test. This test is needed to see the validity of this instrument before it will be applied to the sample of research.
The writer analyzed this instrument by using ANATES. It could be seen from the result of this test, there were 16 items were very significance, 4 items
significance and 20 items is not significance. So, in this research used 20 items of multiple choice as an instrument for pretest and posttest about descriptive text.
