Design of this Research

CHAPTER III RESEARCH METHODS

The research method dealt with the procedures or steps to conduct research systematically. It consisted of research design, area determination method, respondent determination method, data collection method, and data analysis method. Each issue was presented respectively in the following sections.

3.1. Design of this Research

Research design is a strategy to arrange the setting of a research to get valid data that matches the variables and objective of the research. The aim of this research was to investigate whether or not there was a significant effect of using puzzle on the eighth grade students’ vocabularies achievement at SMPN 14 Jember in the 20132014 Academic Year. The research design in this research was quasi experimental design using post- test only control group design which consisted of experimental group and control group. In this research, the experimental group received treatment that was teaching vocabulary by using Puzzle, while the control group was taught vocabulary by using Question and AnswerQ-A technique. The design could be diagrammed as follows: Treatment Post-test Exp. Group A X T Control Group B O T Notes: X = Treatment O = Conventional Teaching Vocabulary Q-A T = Post Test McMillan, 1992:176 The procedures of the design were as follows. 1. Giving homogeneity test to all the existing eighth classes to know the homogeneity of the population. The homogeneity test result was analyzed by using ANOVA formula. 2. Determining two classes to be the experimental group and the control group randomly by lottery. 3. Giving treatment to the experimental group, that was teaching vocabulary by using puzzles; while the control group was taught without using puzzles, that was lecturing method Q-A. 4. Administering a try out for post-test to establish the reliability of the test, index difficulty and time allocation of a teacher-made-test and analyzing the result. The try out was administered to the class that did not belong to the respondents. 5. Giving post-test to both the experimental and the control groups to measure the students’ vocabulary achievement after the treatment. 6. Analyzing the results of the post-test by using t-test formula of 5 significance level to know the mean difference of the groups, whether the mean difference is significant or not. 7. Drawing a conclusion based on the data analysis to answer the research problem. 8. All the data was analyzed by using t-test formula by using SPSS.

3.2. Area Determination Method