Descriptor
| Age Differences | 1 |
| Child Development | 1 |
| Classification | 1 |
| Comprehension | 1 |
| Difficulty Level | 1 |
| Intellectual Development | 1 |
| Performance Factors | 1 |
| Research Methodology | 1 |
| Testing | 1 |
Source
| Child Develop | 1 |
Author
| Ahr, Paul R. | 1 |
| Youniss, James | 1 |
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Ahr, Paul R.; Youniss, James – Child Develop, 1970
Descriptors: Age Differences, Child Development, Classification, Comprehension
