Reza Taufik Maulana, 2014 NUMBERED HEADS TOGETHER NHT: AN ENDEAVOUR TO IMPROVE STUDE
NT’S SCIENTIFIC CREATIVITY AND MASTERY CONCEPT IN LEARNING GLOBAL WARMING
Universitas Pendidikan Indonesia
| repository.upi.edu
| perpustakaan.upi.edu
e. Readability
Readability will be used to analyze essay questions. Readability has two common meanings, one applying to document design, the other to language.
Readability as it is applied to document design is concerned with such matters as line length, leading, white space, font type and the like
Marnell2009 quoted by Sejati 2013.
F. Instrument Analysis Result
1 Recapitulation of Students’ Mastery Concept Instrument
The instrument for measuring students‟ cognitive achievement is by giving an objective test in a form of 37 questions. The instrument should be
tested in terms of validity, reliability, discriminating power, and difficulty level as explained before. The test was given to 26 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.
Test item recapitulation:
Reliability test : 0.60 Medium degree
Table 3.15 Recapitulation of test item for students‟ mastery concept
Question Number
New Number
Discriminating Power
Validity Difficulty Level
Status 1
- Rejected
Very Low Rejected
Rejected 2
- Rejected
Very Low Rejected
Rejected 3
- Rejected
Invalid Revised
Rejected 4
1 Revised
Low Accepted
Revised 5
- Rejected
Very Low Rejected
Rejected 6
2 Accepted
Low Revised
Revised 7
- Revised
Very Low Rejected
Revised 8
- Rejected
Invalid Rejected
Rejected 9
3 Accepted
Average Accepted
Accepted
Reza Taufik Maulana, 2014 NUMBERED HEADS TOGETHER NHT: AN ENDEAVOUR TO IMPROVE STUDE
NT’S SCIENTIFIC CREATIVITY AND MASTERY CONCEPT IN LEARNING GLOBAL WARMING
Universitas Pendidikan Indonesia
| repository.upi.edu
| perpustakaan.upi.edu
Question Number
New Number
Discriminating Power
Validity Difficulty Level
Status 10
- Rejected
Invalid Rejected
Rejected 11
4 Revised
Very Low Revised
Revised 12
5 Revised
Very Low Accepted
Revised 13
6 Revised
Very Low Accepted
Revised 14
7 Accepted
Average Revised
Revised 15
- Revised
Average Rejected
Rejected 16
- Rejected
Very Low Revised
Rejected 17
8 Accepted
Low Accepted
Accepted 18
9 Accepted
Low Revised
Revised 19
10 Revised
Average Rejected
Revised 20
- Rejected
Invalid Rejected
Rejected 21
11 Revised
Very Low Accepted
Revised 22
12 Accepted
Average Revised
Revised 23
13 Accepted
Average Accepted
Accepted 24
14 Accepted
Average Revised
Revised 25
15 Accepted
High Revised
Revised 26
16 Revised
Very Low Accepted
Revised 27
17 Revised
Low Revised
Revised 28
18 Accepted
Average Accepted
Accepted 29
19 Revised
Low Revised
Revise 30
20 Accepted
High Accepted
Accepted 31
21 Accepted
High Revised
Revised 32
22 Revised
Low Rejected
Rejected 33
23 Accepted
Low Revised
Revised 34
24 Accepted
High Accepted
Accepted 35
25 Revised
Very Low Revised
Revised 36
26 Accepted
Average Accepted
Accepted 37
27 Accepted
Low Accepted
Revised
2 Recapitulation of Students’ Scientific Creativity Instrument
The instrument for measuring students‟ scientific is by giving an essay test in a form of four questions. The instrument should be tested in terms of
validity, reliability, discriminating power, difficulty level, and readability as explained before. The test was given to 26 students which have learned
Reza Taufik Maulana, 2014 NUMBERED HEADS TOGETHER NHT: AN ENDEAVOUR TO IMPROVE STUDE
NT’S SCIENTIFIC CREATIVITY AND MASTERY CONCEPT IN LEARNING GLOBAL WARMING
Universitas Pendidikan Indonesia
| repository.upi.edu
| perpustakaan.upi.edu
about the chapter that will be learned for the research. The recapitulation of test item analysis is shown in the following table.
Essay test recapitulation:
Reliability : 0.76 High degree
Table 3.16 Recapitulation of test item for students‟ scientific creativity
No Discriminating Power
Validity Difficulty Level
Status D
Notes R
xy
Notes P
Notes
1 28.57
Revised 0.434
Revised 33.93 Accepted
Accepted
2 68.37
Accepted 0.896
Accepted 45.41 Accepted Accepted
3 60.44
Accepted 0.786
Accepted 41.21 Accepted Accepted
4 40.44
Accepted 0.814
Accepted 30.82 Accepted Accepted
2. Instrument Non-Test Requirements a. Rubrics
The rubrics will be used to observe the implementation of teacher‟s in numbered heads together and students activity during the implementation, the
rubrics will be fulfilled both by the observer and the students
b. Questionnaire
Unstructured questionnaire is used to know the response of the students towards the implementation of numbered heads together in learning global
warming. This data obtained from students‟ answer from 24 questions given in the end of the lesson.
Reza Taufik Maulana, 2014 NUMBERED HEADS TOGETHER NHT: AN ENDEAVOUR TO IMPROVE STUDE
NT’S SCIENTIFIC CREATIVITY AND MASTERY CONCEPT IN LEARNING GLOBAL WARMING
Universitas Pendidikan Indonesia
| repository.upi.edu
| perpustakaan.upi.edu
G. Research Procedures
