of this study is the tenth graders of SMA Islam Ta‟allumul Huda Bumiayu in the academic year 2014 2015 which consists of 187 students.
3.2.2 Sample
The writer conducted a quasi- experimental research in SMA Islam Ta‟allumul
Huda Bumiayu. Best 1981: 81 states that “A quasi-experimental design is an
experimental design that the subject of the research is not chosen randomly because there are two groups experimental group and control group.” In this
study, the writer used class X MIPA 1 of SMA Islam Ta‟allumul Huda Bumiayu, academic year 2014 2015 consisting of 31 students as the sample. The writer
chose that class because the English lesson schedule of this class was every Wednesday at 10:15 a.m. until 14:00 p.m. That was convenient time for teaching
English using game since it helped refresh students‟ brain after having some classes. In addition, the writer considered that it was better to give students
stimulus in learning vocabulary earlier, so that they would have a lot of practicing.
3.3 Role of the Researcher
In this study, the writer holds some roles. First, the writer takes a role as an observer. The writer sees the condition of the class in order to know how the
condition of the class. By asking to the teacher, the writer considers to choose one class to be an experimental group and one class to be a control group. Both groups
are given pre-test and post-test. The tests are given in order to measure how far students understand the English vocabulary. By giving the tests, the writer collects
all the students‟ worksheets. It means that the writer is called as a collector data.
After that, the writer analyses all of the data. In this case, the writer holds the rule of corrector.
3.4 Type of Data
In this study, there were two types of data that were used; they were quantitative and qualitative data.
3.4.1 Quantitative Data
The quantitative data in this research was the students‟ scores in forming several
words. Their score was taken from pre-test, quizzes, and post-test.
3.4.2 Qualitative Data
The qualitative data of this research were field note and questionnaire. The field note was used to observe the students‟ participant and attitude during the
treatment. Whereas, the questionnaire was used to get some data from students‟
opinion about the use of texttwist game for teaching vocabulary.
3.5 Procedures of Collecting Data
In this study, there were two tests, namely pre-test and post-test. Pre-test was given to both experimental and control group to measure the students‟
achievement in forming several words from the jumbled letters which was given. After having a treatment play texttwist game in the experimental group, post-test
was given to both groups. The writer also did some observations during the treatment by using field
note. It was used to observe the students‟ participant and attitude. Besides, the
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