Uji Validitas dan Reliabilitas Skala Keterampilan Sosial dan Kepercayaan Diri Peserta Didik SMA

Abstract

This study aims to describe the validity and reliability of the Social Skills Scale and 
the Self-Confidence Scale used in research on the influence of interpersonal 
communication skills and social skills on students' self-confidence at SMAN 7 
Kediri. This study uses a quantitative approach. Both instruments were tested on 
42 students outside the research sample. Validity was analyzed using Pearson 
product moment correlation with SPSS; reliability was analyzed using Cronbach's 
Alpha (r table = 0.304, df = 40, significance 5%). Of the 25 items on the Social Skills 
Scale, 21 items were valid with a Cronbach's Alpha of 0.882. Of the 20 items on the 
Self-Confidence Scale, 15 items were valid with a Cronbach's Alpha of 0.785. All 
indicators of both scales remained represented by valid items. Both scales are 
declared valid and reliable (α > 0.70) and are suitable instruments for data collection 
in the subsequent research phase.