DATA PRESENTATION AND ITS FINDING

CHAPTER IV DATA PRESENTATION AND ITS FINDING

A. Data Presentation and Research Finding Related to the Reseacrh Problem

This chapterdiscuses about data presentation and research finding related to reseacrh problem ( consist of validity, reabiality, index difficulty effectiveness distracter), and discussion.

1. Va;idity of Test Items

a. Face Validity The test is to have face validity if the intrucsion of the test is understood by the studenrts. The writer has found that the instruction used on summative test at seventh grade of MTs Islamiyah Plangka Raya in second semester has fullfied the face validity as seen in table 4.1 as follows.

Table 4.1 The Face Validity

No Instruction of the item

Number of item

Criteria

Valid Choose the correct answer A,B,C or D for each number

1 Question 1-3

1-3

2 Question 4- 10

Valid Are based on the following text

4-10

3 Question 11-25

Valid Are based on the following text

11-25

4 Question 26-42

Valid Are based on the following text

26-42

5 Question 43-46

Valid Choose the correct words

43-46

6 Question 47-50

Valid Are based on the following text

47-50

Based on the table, it can be concluded that all the instruction of the test are valid. It is known all the instruction can be understood by the students.

b. Content Validity Content Validity is also called curricular validity. The test is said has content validity if content os proper with the scope and content of curriculum in school. Content test has suitable or represent the sample of learning result that should be achieved according to curriculum.

c. Construt Validity

A test is said has construct validity if the is arrenged to be able to measure every aspect of thinking that is written in curriculum. In this case, the analysis of the construct validity test has done by seeing the syllabus of English subcjek at MTs Islamiyah Palangka Raya which use competency based curriculum 2013. See the table below to know the appropriateness of the test with syllabus.

Based on the table above, it can be seen taht the items is not distributed entiretly based on syllabus. So, it can be conlcuded that the test at the seventh grade of MTs Islamiyah Palangka Raya is effective enought to respresent all kinds Based on the table above, it can be seen taht the items is not distributed entiretly based on syllabus. So, it can be conlcuded that the test at the seventh grade of MTs Islamiyah Palangka Raya is effective enought to respresent all kinds

d. Validity Test The validity of English test items that is made by the English teacher can

be determine by using formula namely point biserial.

r pbi = √

where : r pbi : coefficent validity of each item M p

: mean of the right answer M t

: mean of the total score SDt : standard deviation from the total score P

: proportion of the students correct answer for each item q

: proportion of the student wrong answer for each item (Sudijono ,2003: 245-246) The interpretation of correlation of coefificients is: r between

0,00- 0,20

: no correlation

: very high ( perfect) Determining the validity of the test items, first make a score table that has been achieved by the student from item number 1 until 50 from 26 students.

0,91-1,00

A. Interview with the English teacher

To know how the summative test is made , the interview was app[lied. It was directed to the english teacher at the seventh grade of MTs Islamiyah Palangka Raya. The prersentation and discussion data serves in a row as follow:

a. Bagaimana ibu mega membuat soal summatif pilihan ganda?

b. Kalau memmbuat soal summatif pilihan ganda saya menggambil beberapa referensi dari buku materi atau LKS yang dapat dipakai oleh siswa dan beberapa buku juga, buku pegangan khusus guru. Selain itu juga saya menggambil beberapa soal yang saya buat ketika di ulangan tengah semester.

a sumber / referensi apa saja yang ibu gunakan dalam membuat soal sumatif?

b kalau sumber referensi untuk pembuatan soal biasanya saya menggunakan buku pengangan guru dab disesuakan dengan buku LKS siswa.

a kenapa ibu menggunakan sumber referansi tersebut?

b karena sumber itu menjadi acuan pembelajar siswa jadi materi – materi yang di ajarkan pada siswa itu dari buku itu makanya saya menggambil soal sumatif.

a apakah ada kesulitan dalam membuat soal sumatif bu?

b kesulitannya hampir tidak ada karena di ambil buku yang sudah ada memiliki acuan untuk soal sumatif jadi tidak ada kesulitan

a apa nama yang ibu gunakan?

b English on the sky

B. Discussion Based on the analysis result of the research, shows that summative test at seventh grade of MTs Islamiyah Palangka Raya at second semester has validity. This explanation is suppoted by Soernadi Djiwandono in his book, “

language test which is valid as a measuring instrument of language ability focuses on its measurement on the language ability of its test participant”

The validity of summative test analyzed throuh face validity shows that whole of the test instructions are valid. It can be seen based on table 4.1 that all the test instructions were clear and understandable. Based on the analysis of the reability, the writer found the reability of the test is 0,84. Therefore, the reability of the test is hihgt. It means the reability of summative test items will

be high consistently on its reability when used retest. The result of index difficulty ana;lysis is gotten easy 0% midlle, 5,4% and difficulty 4,6%. It shows that most of the summative items of the test easy.

The result interview about how summative test is made, the teacher said that the english summative test made based on latteicawork taught with the index difficulty 20% easy, 50% middle, 30% difficulty.