1. Validity
The validity test is used to get valid instrument to obtain provisions between the actual data happened on the object with the data collected by
the researcher. The formula used to test the validity of this research is the Correlation of Product Moment by Pearson.
The formula is as follows:
Notes : r
xy
= Correlation coefficient of the independent variable and The dependent variable
= Total multiplication scores of independent variable and The dependent variable
X = Total score of independent variable
Y = Total score of dependent variable
X
2
= Total quadratic score of independent variable Y
2
= Total quadratic score of dependent variable N
= Number of subject or respondent Suharsimi Arikunto, 2010:213
Criteria for submission of an item is valid if r
emp
correlation coefficient r
xy
is positive and equal to or greater than r
table
with a significance level of 5, if r
emp
less than the score of the r
table
item, it can be said as an invalid question.
This instrument testing conducted on 30 students of grade XII IPS SMA Negeri 1 Cilacap with a questionnaire sheet of Moving Class
Implementation totaled 15-point of questions, variable of Accounting Classrooms Facility totaling 15 point of questions and the Students
Learning Motivation numbered 20-point of questions was analyzed using SPSS Statistics 17.0 for Windows.
Based on the output obtained from the SPSS Statistics 17.0 for Windows output in appendices, known the correlation between item scores
and total score. This score is then compared with the score of r
table
at 5 significance level by the number of data N = 30 that is equal to 0.361. In
Moving Class Implementation questionnaire X
1
, the correlation score for the item number 4, 7, 8, 9, 10, 13 and 15 is less than 0.361. Then, in the
questionnaire of Accounting Class room’s Facilities X
2
, the correlation score for the item numbers 6 and 14, is less than 0.361. While on Students
Learning Motivation in Accounting Learning questionnaire Y, the score of the correlation for item numbers 2, 4, 17, 18, 19 and 20 is less than 0.361. It
can be concluded that these items are not correlated with the total score invalid and should be removed or improved. Whereas on the other items
that the score are more than 0.361, it can be concluded that the item is a valid instrument.
The summary of the validity testing results are as follows:
Table 6. Summary of Instruments Validity Testing Result
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