Relevant Study THEORITICAL FRAMEWORK

F. Hypothesis

This research is to know whether teaching vocabulary by using cooperative learning is an effective technique to increase students’ interest in learning English. And to find the answer of the problem, the writer should propose alternative Hypothesis Ha and Null Hypothesis Ho as bellow: a. The Experiment Hypothesis Ha. There is a significance difference between the students’ vocabulary of adjectives scores taught by using Cooperative Learning and without using Cooperative Learning for students at MTs. Al- Ishlah Cikarang. b. The Null hypothesis Ho. There is no significance difference between the students’ vocabulary of adjectives scores taught by using Cooperative Learning and without using Cooperative Learning at MTs. Al-Ishlah Cikarang. 31

CHAPTER III RESEARCH METHODOLOGY

A. Research Methodology

1. The Place and Time of Research

The writer conducted the research at MTs Al- Ishlah, Cikarang utara - Kab.Bekasi from 01 st up to 30 th of November 2012.

2. The Method of Research

In collecting the data, the writer used experimental research, which consited of experiment class and conventional method controlled class

3. The Technique of Sample Taking

1. Population Based on Prof.Dr.SuharsiniArikunto, population is whole of research subject. 1 The population in this research is students of eight grade of MTs Al- Ishlah cikarang utara-Kab.Bekasi. There are about 250 students of eighth grade. But the writer only took 40 students of them. 2. Sample Sample is part of population research 2 . And the technique of sample taking in this research is random sampling. The sample of the research was two classes of the eighth grade students of MTs Al- Ishlah Cikarang Utara-Kab. Bekasi, they are 8-a and 8- b. Both classes are equal, such as: 1 Prof.Dr.SuharsiniArikunto, “ ProsedurPenelitian, SuatuPendekatanPraktik”, Jakarta: PT. RenekaCipta, 2006 p.130 2 Prof. Dr. SuharsiniArikunto,” ProsedurPenelitian, SuatuPendekatanPraktik”, Jakarta: PT.RinekaCipta, 2006 p.131 1. Consist of 45 students 2. The classroom is large enough. 3. The students come from the middle-lower social life 4. Almost of the students parents are seller or vendor 5. The students have no high motivation in learning, etc The writer decided to take two classes of eight grade of MTs Al- Ishlah Cikarang utara-Kab.Bekasi that is 8-a and 8-b which consist of 45 students for each classes, and the writer took 20 students from each class by random sampling, 8- a student’s taught teaching vocabulary adjective by using cooperative learning called Experiment class and 8-b students taught without cooperative learning called Controlled Class.

4. The Instrument of Research

The instrument of the research used by the writer in collecting data is taken from the application test of vocabulary adjective. The writer gave the test to eight grade students of MTs Al- Ishlah, which was decided into two categories, the first students is taught by using cooperative learning method and second students is taught without using cooperative learning method. Pre-test and post test are the test given in this research. Pre-test is the test given to the students before the test vocabulary of adjectives by using Cooperative Learning method. The post-test is given to the students after the students had got the treatment or the teaching process through Cooperative Learning method. Post-test is the test given to the students for checking the progress after teaching vocabulary of adjective by using Cooperative Learning. The test of post-test is the same as the test of pre-test in the form of instruments test. The test consisted 45 items. See appendix

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