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| Cognitive Ability | 1 |
| Doctoral Dissertations | 1 |
| Elementary School Students | 1 |
| Intellectual Development | 1 |
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| Training | 1 |
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| Journal of Research in… | 1 |
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| Bredderman, Theodore A. | 1 |
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Peer reviewedBredderman, Theodore A. – Journal of Research in Science Teaching, 1973
Effects of external reinforcement and cognitive conflict-based treatments on students' acquisition of ability to control variables at an early age were studied. Smedslund's finding was confirmed. Nearly half of trained students with a mean age of 11.8 years could be classified in late formal operations. (CC)
Descriptors: Cognitive Ability, Doctoral Dissertations, Elementary School Students, Intellectual Development
