In discriminating power, there are four categories. They are poor, satisfactory, good, and excellent. From 40 items of try-out test, there were 10
items that were poor, 28 items were satisfactory, and 2 items were good.
4.1.4 Reliability
In a test, the reliability of the test is needed to be calculated for the category of a good test. The reliability of the test was calculated from the number
of items, the means of scores, and the total of variants. A test is considered to be reliable if r11 result of calculation is higher than r in the table 0.312. From the
calculation for α significance level 5 and the number of students is 40, the result was 0.60. Since the r
11
is higher than r
table
, the test was considered to be reliable. See Appendix 7
4.2 Activities of the Research
In this research, there were three main activities. Those were pre-test, treatments, and post-test.
4.2.1 Pre-Test
Pre-test was given before doing the experiment. The pre-test was given in class XI IPA 1 at April 11
st
2011. In pre-test, the students were given thirty items of reading comprehension test of hortatory exposition text. This was used to
measure the students’ ability in comprehending hortatory exposition text before they were given any treatment. They were asked to do the test for about 90
minutes.
4.2.2 Treatment
In conducting the experiment, the students of experiment group were given treatments after pre-test for two times; the first was at April 28
th
2011 and the second was at May 2
nd
2011. The purpose of these treatments was to apply the use of paraphrasing in comprehending hortatory exposition text. In the first meeting,
the writer gave the students a hortatory exposition text. The writer gave an explanation about the definition and example of paraphrase, especially paraphrase
of a sentence. The writer also gave a material about present tense. After that the writer assigned the students to make paraphrase of some sentences in the text. The
writer also gave them several questions related to the passage. The questions were about analyzing the generic structure, language feature, and determining the main
idea. Besides, the writer also treated them in mastering of vocabulary, for example in finding the meaning of some words in the passage. In the second meeting, the
students were given the different topic of the text. In this meeting, the writer tried to treat them to paraphrase a paragraph. The writer also treated them with the
several questions like in the first meeting. After that the writer assigned the students to make paraphrase of some paragraph in the text. The aim of giving
treatments about paraphrase was to help the students in comprehending the texts given.
4.2.3 Post-Test
Post-test was given after all treatments had already been done. The post- test was conducted at May 5
th
2011. The test items of post-test were the same as the test items of pre-test.
4.3 Normality Test of Pre-test and Post-test Data
