Rizal Syafrudin,2014 THE EFFECT OF 5E LEARNING CYCLE MODEL TO IMPROVE STUDENT’S LEARNING ACHIEVEMENT IN
POLLUTION AND ENVIRONMENTAL DAMAGE Universitas Pendidikan Indonesia
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d. Reliability Test
Reliability according to the Word 2000 is a measure of the extent to which a measuring instrument gives a completely reliable about ability of a
person. If the measuring instrument has a high reliability of the measurements were performed repeatedly with the measuring instrument to the same subject in
the same condition in the same conditions will produce the same information or the same approach. One of the ways to calculate the reliability of a test without
splitting the two tests is by using the Kuder-Richardson 20 formula, with the formula:
= [1 −
∑
] Description:
k = number of question p = proportion of correct responses to a question
q = proportion of incorrect responses to a question s
2
= variance of test scores
Table 3.5 Classification of Reliability Coefficient
≤ 0,00
Very poor 0,00
≤ 0,20
Poor 0,20
≤ 0,40
Fair 0,40
≤ 0,70 Good
0,70 ≤ 1,00 Very good
Rizal Syafrudin,2014 THE EFFECT OF 5E LEARNING CYCLE MODEL TO IMPROVE STUDENT’S LEARNING ACHIEVEMENT IN
POLLUTION AND ENVIRONMENTAL DAMAGE Universitas Pendidikan Indonesia
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Value
11
r
Interpretation 0,90 ≤ ≤ 1,00
Very high reliability degree
0,70 ≤ 0,90
High reliability degree
0,40 ≤ 0,70 Medium reliability degree
0,20 ≤ 0,40 low reliability degree
0,20 Very low reliability degree
e. Instrument analysis result 1 Recapitulation of Students’ Learning Achievement Instrument
The instrument for measuring students’ learning achievement is by giving a
multiple choice test in a form of twenty questions. The instrument should be tested in terms of validity, reliability, discriminating power and difficulty level, as
explained before. The test was given to 28 students which have learned about the chapter that will be learned for the research. The recapitulation of test item
analysis is shown in the following table.
Reliability: 0.63 Medium reliability degree
Table 3.6 Recapitulation of Test Item for Students’ Learning Achievement
Question Number
Discriminating Power
Difficulty Level
Validity Status
1 Poor
Very easy Invalid
Not Used 2
Poor Very easy
Invalid Not Used
3 Poor
Easy Very low
Revised 4
Very good Difficult
Low Used
Rizal Syafrudin,2014 THE EFFECT OF 5E LEARNING CYCLE MODEL TO IMPROVE STUDENT’S LEARNING ACHIEVEMENT IN
POLLUTION AND ENVIRONMENTAL DAMAGE Universitas Pendidikan Indonesia
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5 Poor
Very easy Invalid
Not Used 6
Very good Easy
Medium Used
7 Good
Easy Medium
Used 8
Very good Medium
Medium Used
9 Poor
Very easy Invalid
Not Used 10
Fair Very easy
Low Revised
11 Poor
Very easy Invalid
Not Used 12
Fair Very easy
Medium Used
13 Very poor
Very difficult
Invalid Not Used
14 Very good
Easy Low
Revised 15
Very good Very easy
Medium Used
16 Poor
Difficult Very low
Revised 17
Poor Very easy
Invalid Not Used
18 Good
Very easy Medium
Used 19
Poor Very easy
Medium Used
20 Poor
Easy Very low
Revised 21
Very good Medium
Very low Revised
22 Poor
Easy Very low
Revised 23
Fair Easy
Low Used
24 Very Poor
Medium Very low
Revised 25
Poor Very
difficult Invalid
Not Used 26
Very poor Medium
Low Revised
27 Poor
Very easy Medium
Used 28
Very good Difficult
Medium Used
29 Very poor
Difficult Very low
Not Used 30
Poor Easy
Invalid Not Used
Question number 3, 10, 14, 16, 20, 21, 22, 24, 26 are revised because discrimination power is fair, poor, very porr and validity is low, very low level so
it should be revised, question number 4, 6, 7, 8, 12, 15, 18, 19,23, 27, 28 are used because discrimination power is good, very good and validity is medium so for
this question is accepted.
2 Instrument non-test requirements a Questionnaire
Questionnaire is used to know the response of the students towards implementation of 5E Learning Cycle model in pollution and environmental
Rizal Syafrudin,2014 THE EFFECT OF 5E LEARNING CYCLE MODEL TO IMPROVE STUDENT’S LEARNING ACHIEVEMENT IN
POLLUTION AND ENVIRONMENTAL DAMAGE Universitas Pendidikan Indonesia
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damage chapter during the lesson and e-book of ipse. This data obtained from students’ answer from 15 questions of each questionnaire given in the end of the
lesson.
G. Data Collection Technique
