Research Design RESEARCH METHODOLOGY

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CHAPTER III RESEARCH METHODOLOGY

A. Research Design

The writer used a quantitative research, in the form of quasi experimental research. The writer used the experimental design because it investigates the influence of using creative story game towards’ students speaking ability. An experimental design is the general plan for carrying out a study with an 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. Quasi experimental research design are similar to randomized experimental design in that they involve of an independent variable but differ in that subjects are not randomly assigned to treatment groups. Because the quasi-experimental design does not provide full control, it is extremely important that researchers be aware of the threats to both internal and external validity and considers these factors in their interpretation. The variety of quasi experimental design can be divided into two main categories, they are post-test only control group design and pre-test-posttest group design. In this research, the writer will apply quasi-experimental pre-test-posttest group design. 49 Creswell states that we can apply the pre-test and post-test approach to a quasi- experimental design 57 . In this research, the writer used two classes, the first one as the experimental class which receives the treatment of the use of the experimental technique and the second one as the control class of the second semester of the tenth grade of SMK Taruna Bandar Lampung. In this research students in experimental class given the treatment by using creative story game and the students in control class given the treatment by using discussion. The design are illustrated as follows: G1 = T1 X T2 G2 = T1 O T2 Note : G1 : Group 1 experiment class G2 : Group 2 control class T1 : Pre-test T2 : Post-test X : Treatment using creative story game O : Treatment using discussion The writer analyzed the result of pre-test and post-test, and compare them. The writer used the control class pre-test and post-test design to measure both control class and 57 Jhon W. Creswell, Educational Research: Conducting and Evaluating Quantitative and Qualitative Research, Personal Education, Boston, Ed. 4 2012, P.310. 50 experimental class achivement. The pre-test was done to both classes before the treatment to know the students early achivement. Then the treatment was done to both the experimental class by using creative story game and for control class by using group disscusion technique. The post-test was done both of classes, the comparison was done between the result of the students achivement before and after treatment. The result determined whether the technique works or not.

B. Population, Sample and Sampling Technique