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| Dudek, S. Z. | 1 |
| Dyer, G. B. | 1 |
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Download full textDudek, S. Z.; Dyer, G. B. – 1969
Analysis of 65 children over a 4-year period on tests of operational and causal thinking offers support for Piaget's notion of stage progression. In kindergarten and grade one, the majority of children in this longitudinal study were between preoperational and the achievement stage of operational thought. By grade two, the majority had attained…
Descriptors: Child Development, Cognitive Development, Cognitive Measurement, Cognitive Tests
