40
2.2.7.  Assessment  of  the  eight-year-old  children
Urban  sample
Table  9
Concept  of  class  inclusion:
Solution  probabilities  at  age  eight
Urban  sample
Task
Judgment
CIA/B201  Red  chips/  uncovered
0.458
CIA/B202  Red  chips/  covered
0.407
CIA/B203  White  chips/  uncovered
0.407
CIA/B204  White  chips  covered
0.424
Table  10
Concept  of  class  inclusion:
Solution  probabilities  at  age
eight
by  teacher  rating
Urban  sample
Teacher  rating
low
Task
Justification
Judgment
CIA/B201  Red  chips/  uncovered
0.367
0.408
CIA/B202  Red  chips/  covered
0.327
0.347
CIA/B203  White  chips/  uncovered
0.347
0.327
CIA/B204  White  chips/  covered
0.367
0.327
Table  11
Concept  of  class  inclusion:
Solution  probabilities  at  age
eight
by  gender
Urban  sample
Gender
female

Task
Judgment  Justification
0.481
0.407
CIA/B201  Red  chips/  uncovered
CIA/B202  Red  chips/  covered
0.370
0.370
CIA/B203  White  chips/  uncovered
0.407
0.444
CIA/B204  White  chips/  covered
0.370
0.370

—

—

Justification
N
59
0.424
59
0.390
0.390
59
0.390
59
high
Justification
Judgment
N
N
10
0.700
0.700
49
49
0.700
10
0.700
49
0.700
0.700
10

0.700
49  0.700
18
male
N
Judgment  Justification
N
0.438
32
27
0.438
32
0.406
27
0.438
0.375
0.375
32
27
27  0.469  0.406  32  —