Descriptor
| Conservation (Concept) | 1 |
| Difficulty Level | 1 |
| Intellectual Development | 1 |
| Primary Education | 1 |
| Responses | 1 |
| Tables (Data) | 1 |
| Task Performance | 1 |
Author
| Peisach, Estelle | 1 |
| Wein, Norman | 1 |
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Peer reviewedPeisach, Estelle; Wein, Norman – Journal of Genetic Psychology, 1970
Descriptors: Conservation (Concept), Difficulty Level, Intellectual Development, Primary Education
