ReliabilityTest
Reliabilityof the Rosenberg selfesteem scale
Case Processing Summary 

N 
% 

Cases 
Valid 
46 
95.8 
Excluded 
2 
4.2 

Total 
48 
100.0 

a. Listwise deletion based on all variables in the procedure. 
Reliability Statistics 

Cronbach`s Alpha 
N of Items 
.875 
10 
Thecase processing summary shows the total number of processed itemsrather the valid cases N is 46 while the missing is 2. The Cronbach’sAlpha value according to the reliability statistics in the table is0.875.In basic decision making on Test Reliability a Cronbach’sAlpha value between 0.70and 0.90 is considered highly reliable, in this case given that0.875>0.600. Therefore we can say that this research instrument isreliable.
Reliabilityof the Parentalauthority questionnaire
Case Processing Summary 

N 
% 

Cases 
Valid 
48 
100.0 
Excluded^{a} 
0 
.0 

Total 
48 
100.0 

a. Listwise deletion based on all variables in the procedure. 
Reliability Statistics 

Cronbach`s Alpha 
N of Items 
.626 
30 
Thetotal number of processed items while testing the reliability of theparental authority questionnaire is 4 with 0 missing. The Cronbach’sAlpha value according to the reliability statistics in the table is0.626.A Cronbach’sAlpha value greater than 0.6 is highlyreliable, in this case since 0.626>0.600,we can say that this research instrument is reliable.
Reliabilityof the narcissistic personality inventory questionnaire
Case Processing Summary 

N 
% 

Cases 
Valid 
46 
95.8 

Excluded^{a} 
2 
4.2 

Total 
48 
100.0 

a. Listwise deletion based on all variables in the procedure. 

Reliability Statistics 

Cronbach`s Alpha 
N of Items 

.152 
40 
Thecase processing summary indicates a total number of 46 itemsprocessed and 2 missing while testing the reliability of the of thenarcissistic personality inventory questionnaire. From the basicdecisionmaking on the reliability test, we can say that thenarcissistic personality inventory questionnairehas low reliability this is because the Cronbach’sAlpha value is less than 0.6.