reliabilitas formula konsistensi internal

FORMULA RELIABILITAS Wahyu Widhiarso

Beberapa Formula Reliabilitas

Wahyu Widhiarso

FORMULA RELIABILITAS Wahyu Widhiarso

ASUMSI DLM

_{TEORI KLASIK}

E

T

X





ASUMSI #1

T

)

X

(





ASUMSI #2

0

et





ASUMSI #3

0

2

1

e

e





ASUMSI #4

0

2

1

t

e





FORMULA RELIABILITAS Wahyu Widhiarso

TES

_PARALEL

2

1

Y

Y

X





Asumsi 1

2

1

x

x



Asumsi 2

2

2

2 y 1

y

s

s



Asumsi 3

0

s

2 1

e

e



Asumsi 4

2 1 2

1

t

y

y

t

r

r



Asumsi 5

Unsur Reliabilitas

2

x

2

t

'

xx

S

S

r



₂

x

2

e

'

xx

S

S

1

r





langsung

secara

diketahui

tidak

S

langsung

secara

diketahui

tidak

S

langsung

secara

diketahui

S

2

e

2

t

2

t

FORMULA RELIABILITAS Wahyu Widhiarso

KONSISTENSI INTERNAL

PEMBELAHAN DUA BAGIAN

•

Spearman-Brown

•

Flanagan

•

Rulon

•

Guttman

•

Feldt

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_{SPEARMAN BROWN}

)

r

1

(

s

2

)

r

1

(

s

2

)

r

(

s

2

s

2

)

r

)(

s

s

(

2

s

s

s

2 1 1

2 1 1

2 1 1 1

2 1 2 1 2

1

y y 2

y

y y 2

y

y y y 2

y

y y y y 2

y 2 y 2 x



















s

s

2

1

y

y



r

r

2 1 2

1

t

y

y

t



FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_{SPEARMAN BROWN}

2

FORMULA

_{SPEARMAN BROWN}

s

belahan

antar

korelasi

r

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_{SPEARMAN BROWN}

S_y22_=0.89 S_y12_=1.22

Varian

4 Kovarian

Skor Belah

3

Subjek

FORMULA RELIABILITAS Wahyu Widhiarso

2

FORMULA

_FLANAGAN

2 T 2 T1 s 2

s 

Varian Skor Tampak (St2)

Varian Skor Murni (S_t2₎

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_FLANAGAN

S_x2_=3.80 Varian

4 5 5 5 9

X

S_xy=0.75 Kovarian

Skor Belah

3 2

3

2 2

5

2 3

4

2 3

2

4 5

1

Y₂ Y₁

Subjek

FORMULA

_RULON

s

s

1

r

₂

x

)

y

y

(

'

xx

2 1

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_RULON

S_d2_=0.75

0 1 -1 1 1

d (Y₁-Y₂)

S_x2_=3.80 Varian

4 5 5 5 9

X

Kovarian

Skor Belah

3 2 3

2 2 5

2 3 4

2 3 2

4 5 1

Y₂ Y₁

Subjek

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_GUTTMAN





2

r

_xx'

s

s

s

1

₂

x

2

y

2

y

_{1 2}



















FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_GUTTMAN

S_y22_=0.89 S_y12_=1.22

S_x2_=3.80 Varian

4

Kovarian

Skor Belah

3

Subjek

FORMULA

_{ALPHA CRONBACH}

s

Varian Skor Murni (St2)

s2 x

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_{ALPHA CRONBACH}

S_x2_{= S} Skor Belah

6

FORMULA RELIABILITAS Wahyu Widhiarso

FORMULA

_FLANAGAN

FORMULA RELIABILITAS Wahyu Widhiarso

s

s

-1

1

-k

k

r

₂

x 2 y xx'

i







 















s

p)

-p(1

-1

1

-k

k

r

₂

x xx'

























)

p

1

(

p

s

2

_y









Cronbach