67 Descriptions :
SR = relative contribution of predictor
a1 = predictor coefficient X1
a2 = predictor coefficient X2
a3 = predictor coefficient X3
∑x
1
y = total product between X1 and Y
∑x
2
y = total product between X2 and Y
∑x
3
y = total product between X3 and Y
Jkreg = total of regression square
Sutrisno Hadi, 2004: 42 b Effective Contributions Sumbangan Efektif SE
Prediktor X
1
= SE= SRX
1
x R
2
Prediktor X
2
= SE= SRX
2
x R
2
Prediktor X
3
= SE= SRX
3
x R
2
Descriptions : SEX1
= effective contribution of X1 predictor SEX2
= effective contribution of X2 predictor SEX3
= effective contribution of X3 predictor SRX1
= relative contribution of X1 predictor SRX2
= relative contribution of X2 predictor SRX3
= relative contribution of X3 predictor R
2
= determinant coefficient Sutrisno Hadi, 2004: 46
4. Locus of Control Category Determination
According to Azwar Saifuddin 2016: 152, Locus of Control Internal and External Category Determination are calculated by score
on the internal and external variable. The total score of internal and external variable is divided by item total each sub. From the score
distribution, we know the mean and each standard deviation are M
int
, M
eks
, S
int
dan S
eks.
And then, the score is changed to z score are used be
categorization of internal and external Locus of Control.
68 Meanwhile, for the individual who has z score is not completing
the categories so it called for clarification. Below these are formulated to differentiate between internal and external Locus of Control.
Tabel 12. The Formula to Determinate the Internal and External Locus of Control Categories
Locus of Control
Individual Score
Z Score Locus of Control
Categories
Locus of Control
internal Internal :
∑X
int
item total
Z
int
: X
int
-M
int
S
int
Z
int
≥ 0.50 and Z
ex
Locus of Control
eksternal Eksternal :
∑X
ex
item total
Z
eks
: X
ex
-M
ex
S
ex
Z
ex
≥ 0.50 and Z
int
Using the price of at least 0.50 as Z score as a characteristic of the existence of a tendency of control locus, which is considered. In the
distribution teoritik, Z score is greater than 0.05 only owned by approximately 39 of the population. Opportunities to obtain Z score
which is greater than 0.50 is 39. Therefore, it can be more trusted that
student who achieve that
criteria does have characterized the locus of control internal or external.
69
CHAPTER IV RESEARCH RESULT AND DISCUSSION
This chapter discuss the report on the results of studies that had been conducted include a general overview of location research, descriptions of
data, test the prerequisite analysis, hypothesis testing, discussion of the results of research and the limitations of the research.
A. Result Research
1. Descriptions of SMA Negeri 2 Sleman
SMA Negeri 2 Sleman is one high school in Sleman Regency. The school is located in Brayut, Pandowoharjo, Sleman. The school is
located in the middle of the settlement residents and Government agencies such as the wards as well as far off the road so that the
learning atmosphere was relatively calm. SMA Negeri 2 Sleman has a building and the land that is broad
enough to accommodate 12 classes, each class as much as 32 students. There are four classes X IIS 1, X IIS 2, X MIA 1, X MIA 2, then there
are four class XI class also XI IPS 1, XI IPS 2, XI IPA 1, XI IPA 2 and class XII consist of XII IPS 1, XII IPS 2, XII IPA 1 and XII IPA 2.
The academic year 20162017 curriculum used for class X is kurikulum 2013, while the curriculum of classes XI and XII Kurikulum
Tingkat Satuan Pendidikan KTSP. SMA Negeri 2 Sleman Regency has the following vision and
mission.
