Data Analysis Technique METHODOLOGY

36 100 x n    where x  : The number of students based on the degree of agreement n  : The number of all students To ascertain the validity of the data acquired from both questionnaire and interview, the researcher conducted data triangulation. According to Patton 2002: 247, data triangulation was “the use of variety of data sources in a study”. He added that data triangulation was intended to produce the consistency of findings. Denzin 1978 as cited in Moleong 1989: 195 claimed that there were four kinds of triangulation techniques, namely the use of source, method, investigating officer, and theory. In this research, the data triangulation used source since “the researcher cross-checked the data acquired from the questionnaire with the results of the interview” Patton, 2002: 195. Basically, the data triangulation was also intended to answer the first research question, which is to explore the students’ perceptions on the implementation of weekly tests. Secondly, dealing with the role of students’ perceptions on their achievements in weekly tests was discussed separately. The researcher analyzed the data using Pearson Product Moment Coefficient of Correlation r. The formula is presented as follows: PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI 37    2 2 2 2 n Y Y r n X X n Y Y           where r = coefficient correlation  = sum of scores in X-distribution Y  = sum of scores in Y-distribution Y  = sum of the products of paired X- and Y- scores 2 X  = sum of the squared scores in X-distribution 2 Y  = sum of the squared scores in Y-distribution n = number of paired X- and Y- scores subjects The result of the computation was meant to reveal whether there was any correlation between students’ perceptions and their vocabulary mastery. Besides, that result would also answer the second research question, which is to what extent the students’ perceptions contribute to their vocabulary mastery.

F. Research Procedure

The researcher had some steps which were essential to the research procedure. First of all, the researcher decided the topic for the research. Next, the researcher formulated research questions. To accommodate the research, the researcher employed survey and correlational research. Survey research was 38 accomplished by distributing a questionnaire and conducting an interview with some students. Afterwards, the researcher correlated the data acquired from the questionnaire and the interview with the students’ final scores. Thus, the researcher accomplished the correlational research. Before constructing the questionnaire and interview guide, the researcher read some related books. Afterwards, the researcher consulted the questionnaire and interview guide with the research sponsors. Having obtained some suggestions from the sponsors, the researcher revised his questionnaire and the interview guide. Subsequently, the researcher asked permission to the Vocabulary I class A lecturer to have a copy of students’ final scores. Next, the researcher came to the class and distributed the questionnaire to the students. After collecting data from the questionnaire, the researcher conducted an interview with some students to verify the data acquired from the questionnaire. The next step was analyzing the data gathered from questionnaire and interview using triangulation. The results of the analysis unveiled the students’ perceptions on the vocabulary weekly tests. Meanwhile, the researcher employed the students’ final scores to find the contribution of students’ perceptions towards vocabulary mastery. To find such contribution, the researcher made use of Pearson Product Moment Coefficient Correlation as the formula. Afterwards, the researcher discussed the findings with the theories presented in Chapter II. PLAGIAT MERUPAKAN TINDAKAN TIDAK TERPUJI