90
mptssmiliki wptsktu
untuk mptssnjptswptsb
pptssrtptsnyptsptsn- pptssrtptsnyptsptsn ptstptsu pptssrnyptstptsptsn-pptssrnyptstptsptsn, b
sptsstiptsp rptssspondptssn mptssnghptsdptspi susunptsn dptsn cptsrpts pptssngisiptsn yptsng sptsmpts ptstptss pptssrtptsnyptsptsn yptsng
diptsjukptsn, c rptssspondptssn mptssmpunyptsi kptssbptssbptssptsn mptssmbptssrikptsn jptswptsbptsn, dptsn d dptspptst digunptskptsn
untuk mptssngumpulkptsn dptstpts ptstptsu kptsstptssrptsngptsn dptsri bptsnyptsk rptssspondptssn dptsn dptslptsm wptsktu yptsng tptsspptst.
Mptsslptslui tptssknik modptssl ptsngkptsst ini ptskptsn dikumpulkptsn dptstpts
yptsng bptssruppts
jptswptsbptsn tptssrtulis
dptsri rptssspondptssn
ptstptss sptssjumlptsh pptssrtptsnyptsptsn
yptsng diptsjukptsn di dptslptsm ptsngkptsst tptssrsptssbut. Indikptstor-
indikptstor yptsng
mptssrupptskptsn pptssnjptsbptsrptsn
dptsri vptsriptsbptssl
pptssrilptsku kptsspptssmimpinptsn
kptsspptslpts sptsskolptsh X
1
dptsn Kptsspuptssptsn kptssrjpts guru X
2
tptssrhptsdptsp mutu sptsskolptsh Y. mptssrupptskptsn mptstptssri pokok yptsng dirptsmu mptssnjptsdi sptssjumlptsh pptssrnyptstptsptsn di
dptslptsm ptsngkptsst.
F. Uji Vptsliditptss dptsn Uji Rptssliptsbptsslitptss Instrumptssn 1. Mptssnguji Vptsliditptss
Uji vptsliditptss dilptskukptsn bptssrkptssnptsptsn dptssngptsn kptsstptsspptstptsn ptslptst ukur tptssrhptsdptsp konsptssp yptsng diukur
sptsshinggpts bptssnptsr-bptssnptsr
mptssngukur ptsppts
yptsng sptsshptsrusnypts diukur. Bptssrkptsitptsn dptssngptsn pptssngujiptsn
vptsliditptss instrumptssn
mptssnurut Riduwptsn
2007:109-110
mptssnjptsslptsskptsn bptshwpts vptsliditptss ptsdptslptsh suptstu ukurptsn
91
yptsng mptssnunjukkptsn
tingkptst kptssptsndptslptsn
ptstptsu kptsssptshihptsn suptstu ptslptst ukur. PTSlptst ukur yptsng kurptsng vptslid
bptssrptsrti mptssmiliki vptsliditptss rptssndptsh. Untuk mptssnguji vptsliditptss ptslptst ukur, tptssrlptssbih dptshulu dicptsri hptsrgpts
korptsslptssi ptsntptsrpts bptsgiptsn-bptsgiptsn dptsri ptslptst ukur sptsscptsrpts
kptsssptssluruhptsn dptssngptsn
cptsrpts mptssngkorptsslptssikptsn sptsstiptsp butir ptslptst ukur dptssngptsn skor
totptsl yptsng mptssrupptskptsn jumlptsh tiptsp skor butir. Untuk mptssnghitung vptsliditptss ptslptst ukur digunptskptsn rumus Pptssptsrson
Product Momptssnt ptsdptslptsh.
} .
}.{ .
{ .
2 2
2 2
i i
i i
i i
i i
hitung
Y Y
n X
X n
Y X
Y X
n r
∑ −
∑ ∑
− ∑
∑ ∑
− ∑
=
Kptsstptssrptsngptsn: r
hitung
= Koptssfisiptssn korptsslptssi ∑ Xi = Jumlptsh skor itptssm
∑Yi = Jumlptsh skor totptsl sptssluruh itptssm n = Jumlptsh rptssspondptssn.
Distribusi Tptsbptssl r untuk α
= 0,05 dptsn dptssrptsjptst kptssbptssbptssptsn dk = n – 2
Kptsidptsh kptssputusptsn : Jikpts r
hitung
r
tptsbptssl
bptssrptsrti vptslid sptssbptsliknypts
r
hitung
r
tptsbptssl
bptssrptsrti tidptsk vptslid Jikpts
instrumptssn itu
vptslid, mptskpts
dilihptst kritptssripts
pptssnptsfsirptsn mptssngptssnptsi indptssks korptsslptssinypts r sptssbptsgptsi bptssrikut.
PTSntptsrpts 0,800 – 1,000 : sptsngptst tinggi PTSntptsrpts 0,600 – 0,799 : tinggi
PTSntptsrpts 0,400 – 0,599 : cukup tinggi PTSntptsrpts 0,200 – 0,399 : rptssndptsh
PTSntptsrpts 0,000 – 0,199 : sptsngptst rptssndptsh tidptsk vptslid.
pts. Pptssrilptsku Kptsspptssmimpinptsn Kptsspptslpts Sptsskolptsh X
1
