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Reliability Instrument of the Research

E. Technique of Data Collecting

After making the instrument, the researcher will collect the data by giving a test to the students. The test technique was one of the data collecting techniques in aquantitative research. 13 In collecting data, the researcher conducted written test to test students’ writing ability. There was only 1 group of students that being researched. This group did pretest, 4 meetings of treatment and posttest. Students wrote in personal and gave peer feedback among group member. In the end of the research, students divided into 2 categories for those ones who were giving elaborated and basic feedback.

1. Pretest

On the first week, the researcher gave explanation about blog such as blog platform, how to create account and how to maintain it. The researcher conducted pretest on 22 nd April or the first week of research time. The researcher gave instruction to students to write and give feedback among group member. Students were divided into 10 groups which is consisted 3 to 4 students. They did written test and gave peer feedback in language laboratory. The next following weeks the researcher did 4 times treatment on 22 nd April to 13 th May 2015. The lesson plan can be seen on appendix.

2. Postest

On the last week, 20 th May, the researcher did postest. Posttest is given after the treatment. With the same procedure as pretest, the students were asked to write and provide feedback on blog platform. After conducting pretest, the researcher and the English teacher d id score the students’ writing. This way can be referred as inter rater reliability to see the reliability of the instrument. The score describes in the following chapter. 13 Tim Penyusun Pedoman Penulisan Skripsi FITK, Pedoman Penulisan Skripsi, Jakarta:FITK,2014,p.65.

F. Technique of Data Analysis

The next process of the research is data analysis. The researcher analyzed data by counting pretest and postest scores. Moreover, the researcher processed participants’ comments and analyzed the interviewed result. The researcher had the normality and homogeneity test to ensure that students’ writing was normal and homogeneous. The parametric statistic used is T-test formulation to analyze the data that gained from pretest and postest.

1. Test of Normality

The researcher used SPSS to analyzed normality to ensure that the data is normally distributed. Normality test is used to know whether the data come from the normal distribution or not. The normality test is done with Liliefors test with requirement as follows: If score of L value ≤ L table , so the data comes from the normal population, but if it is not fulfilled this requirement, so the data does not come from normal population. Score of L value is got from Liliefors formula as follows: ̅ in which, Z i = normality X i = data from every sample = deviation standard ̅ = mean The criteria of determining the normality of the data was: a. If L value was smaller than L table L value L table , it means that the data were distributed normally b. If L value greater than L table L alue L table , it means that the data were not distributed normally.

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