208 
Continuation: 
Table 112 
Identification of operative variable 
at age 15 by region 
Rural sample 
West 
Region 
positive 
no 
identifi- 
operative 
Variable Task 
Variable 
cation 
— 
— 
0.056 
0.722 
Plant Task 
IVP502 
House Task 
0.667 
IVH502 
0.222 
0.056 
IVT502 Toy Task 
0.611 
— 
South 
Region 
 
 
positive 
no 
operative 
identifi- 
Variable Task 
Variable 
cation 
IVP502 
0.500 
0.083 
Plant Task 
 
House Task 
IVH502 
0.583 
 
0.250 
IVT502 
0.250 
0.667 
Toy Task 
Table 113 
Identification of non-operative variable 
at age 15 
Rural sample 
No 
Exclusion 
by 
Exclusion 
positive 
Variable Task 
value 
IVP503 
0.557 
0.230 
 
Plant Task 
IVH503 
 
House Task 
0.525 
0.246 
IVT503 
0.311 
0.525 
Toy Task 
negative 
operative 
Variable 
0.056 
0.111 
0.056 
negative 
operative 
Variable 
0.125 
0.000 
0.000 
Exclusion 
by negative 
value 
0.066 
0.049 
0.016 
pos. & 
neg. 
operative 
Variable 
0.167 
0.000 
0.278 
pos. & 
neg. 
operative 
Variable 
0.292 
0.167 
0.083 
Exclusion 
by 
both 
0.148 
0.180 
0.148 
N 
18 
18 
18 
N 
24 
24 
24 
N 
61 
61 
61