Abstract:
The purposes of this research are 1)To determine the validity level of confidence
scale in class XI Science SMAN 5 Pekanbaru Academic Year 2012/2013, 2)To
determine the reability of confidence scale in class XI Science SMAN 5 Pekanbaru
Academic Year 2012/2013. While the benefits of the research is to extend the insight
and knowledge about the validity and reliability of the confidence scale in high school
students and can be used as a reference for further research. This research uses
descriptive analytic method. To measure the validity and reliability of the confidence
scale developed by the researcher, based on the characteristics of individuals who is
stated by Thursan Hakim (2005). Processing of the data processed by statistical
analysis with the aid of a computer program SPSS 11.5 for Windows. For validity, the
correlations obtained ranged from 0.033 to 0.615 . The correlation between each item
to the total score only item 33 and item 60 which has a probability value greater than
0.05 (p>0.05). Thus, item 33 and item 60 is declared invalid. From 60 items confidence
scale that measured, 58 items is valid and 2 items are declared invalid. Then, the level
of validity of the 58 items confident scale in this study contained 31 items are classified
as moderate, 25 item is low and 2 item relatively very low. While, on reliability test by
using Cronbach alpha values obtained 0.9074 which means as very reliable.
