Kisi-kisi instrumen observasi Instrumen Penelitian
39
I n s t r u m e n y a n g t e l a h t e r s u s u n , d i u j i v a l i d i t a s d a n r e l i a b i l i t a s n y a . M
e n u r u t S u h a r s i m
i A r i k u n t o , 2010: 211
“V a l i d i t a s i n s t u m e n a d a l a h s u a t u u k u r a n y a n g m
e n u n j u k k a n t i n g k a t - t i n g k a t k e v a l i d a n a t a u k e s a h i h a n s u a t u i n s t r u m e n . S e b u a h
i n s t r u m e n
d i k a t a k a n v a l i d
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e m p u n y a i
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e n y a n g k u r a n g v a l i d m e m
i l i k i v a l i d i t a s r e n d a h ”.
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m e d i a d a n a h l i m
a t e r i d i l a k u k a n m e l a l u i p e n i l a i a n p a r a a h l i
expert judgement , s e d a n g k a n a n g k e t y a n g d i g u n a k a n o l e h s i s w
a d i l a k u k a n u j i c o b a d a n h a s i l n y a d i h i t u n g d e n g a n k o r e l a s i
product moment d e n g a n r u m u s s e b a g a i b e r i k u t : =
2 2
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b a r 6. R u m u s K
o r e l a s i Product moment
A n g k e t u n t u k s i s w
a y a n g d i u j i c o b a k a n m e m
i l i k i 17 b u t i r p e r t a n y a a n . H a s i l
u j i c o b a y a n g t e l a h d i h i t u n g m e n g g u n a k a n
software SPSS 17 for windows m
e n u n j u k k a n b a h w a b u t i r - b u t i r i n s t r u m
e n p e n i l a i a n s i s w a m
e m i l i k i v a l i d i t a s
t i n g g i , k e c u a l i b u t i r n o 3 d a n n o 7 y a n g m e m
i l i k i v a l i d i t a s r e n d a h g u g u r , s e h i n g g a j u m
l a h b u t i r p e r t a n y a a n p a d a a n g k e t m e n j a d i 15 b u t i r .
S e l a i n v a l i d i t a s , i n s t r u m e n y a n g t e l a h d i s u s u n j u g a d i h i t u n g t i n g k a t
r e l i a b i l i t a s n y a . “Reliabilitas menunjuk pada satu pengertian bahwa sesuatu
i n s t r u m e n d a p a t d i p e r c a y a u n t u k d i g u n a k a n s e b a g a i a l a t p e n g u m
p u l d a t a k a r e n a i n s t r u m
e n tersebut sudah baik” Arikunto, 2010: 221. D a l a m p e n e l i t i a n i n i ,
p e n g u k u r a n r e l i a b i l i t a s i n s t r u m e n d i l a k u k a n d e n g a n r u m
u s alpha cronbarch,
k a r e n a i n s t r u m e n p e n e l i t i a n y a n g d i g u n a k a n m
e n g g u n a k a n s k a l a l i k e r t . R u m u s
alpha cronbarch d a p a t d i t u l i s k a n s e b a g a i b e r i k u t :