(split-half method) - . . : , . , , , .
. 5.31 . 5.32.
(5.74), , .
5.31. ( )
X, | Y, | XiYi | (Xi)2 | (Yi)2 | |
1 | X1 | Y1 | X1Y1 | (X1)2 | (Y1)2 |
2 | X2 | Y2 | X2Y2 | (X2)2 | (Y2)2 |
N | Xn | Yn | XnYn | (Xn)2 | (Yn)2 |
(Xi) | (Yi) | (XiYi) | (Xi)2 | (Yi)2 |
. 5.28 . 5.32.
. 5.32 (5.74)
0,78 , , 10 , 5. 10
5.32. ( )
1 | X, | Y, | ,, | (* | (I? |
1 | 3 | 3 | 9 | 9 | 9 |
2 | 1 | 1 | 1 | 1 | 1 |
3 | 1 | 0 | 0 | 1 | 0 |
4 | 5 | 4 | 20 | 25 | 16 |
5 | 1 | 3 | 3 | 1 | 9 |
6 | 2 | 2 | 4 | 4 | 4 |
7 | 3 | 2 | 6 | 9 | 4 |
8 | 2 | 2 | 4 | 4 | 4 |
9 | 4 | 5 | 20 | 16 | 15 |
10 | 2 | 4 | 8 | 4 | 16 |
24 | 26 | 75 | 74 | 88 |
rn 10
, ( =0,78). : .
, . . () (Internal-Consistency Method).
.
, .
|
|
( ouehok )
(F. Kuder, M. Richardson 20, KR-20) [48]
j j- ; qj , qj = 1 pj, Sx 2 ; .
Sx 2 =6,89 (.
. 5.2), a pj (j = 1,2,..., 10) . 5.27.
(5.76) (0,76 0,78).
, - , . , , .
0,7. . , . , 0,8 . , 0,9, . , . , (0,8; 0,9).
, . , , , . , .
, .
, .
k , ; r ; (r)' [12].
, , , . , , , . , , . , , .
(5.27) . , r=0,7 3 ,
|
|
r= 0,7 .
(5.77), , r=0,7, , . r, , .. r,
, r= 0,7, r= 0,88,
, , , , , . , , . , , .