4. Catalytic validity
Catalytic validity concerns with how the research leads the participants to better understanding and takes further actions or changes. The research
allows all the participants to deepen their understanding of the social realities of the context. This validity was accomplished as there were some positive
changes after the implementation of the actions.
5. Dialogic validity
The dialogic validity is related to the process of peer reviews in the action research. The researcher can fulfill the dialogic validity by discussing
the research findings with the collaborator. Any useful suggestion to improve the quality of the actions of the research should be considered.
The five criteria above were used in this research. Besides that, the researcher used Pearson correlation to test the validity of the instrument in this
research. The Pearson’s product moment correlation showed if the correlation
between each question items were significant. An instrument was said as valid if the r
pearson
was bigger than the r
table
r
pearson
r
table
. The invalid questions in the instrument will be eliminated by the researcher. The data obtained were analyzed
using the SPSS 16 computer program. The following table is the table of critical values for Pearson correlation the r
table
. There were 30 participants in this research, so the r
table
used is 0.361 from the 5 significant level.
Table 2: Table of Critical Value for Pearson Correlation
N Significant level
N Significant level
5 1
5 1
5 0,878
0,999 35
0,334 0,430
10 0,632
0,765 40
0,312 0,403
15 0,514
0,641 45
0,294 0,380
20 0,444
0,561 50
0,279 0,361
25 0,396
0,505 55
0,266 0,345
30 0,361
0,463 60
0,244 0,317
The pre-test was tested to the students to validate the questions items in the tests. The try out pre-test was conducted in the class 4A of SD N
Gambiranom. The instrument was in the form of multiple choices with 26 item questions. The first set with 13 questions was about the occupation topic and the
other set with 13 questions was for the public places vocabulary. The questions were to test students’ knowledge about the vocabulary.
N is the total of students taking the test as the test subject. There were 30 students so the r
table
used is 0.36. After the data was calculated with SPSS 16, the result was that some of the items were invalid. The items became invalid when the
r
pearson
is less than the r
table
which is 0.361. The invalid items from the first set were number 2, 8, and 13. In the second set, the invalid items were number 18, 21,
and 24. Therefore, the invalid items from both sets were eliminated from the instrument. It can be seen from the following table.
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