Developmental Changes in Reasoning Strategies
| Autor: | Barbro M. Bergling |
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| Rok vydání: | 1999 |
| Předmět: | |
| Zdroj: | European Psychologist. 4:157-164 |
| ISSN: | 1878-531X 1016-9040 |
| Popis: | It is frequently necessary to make comparisons between scales or items using some common items and measuring the same trait. A methodology to solve this problem is the Rasch equating procedure for comparisons between two or more test instruments, given that they measure the same construct and have some test items in common. This equating procedure was applied on two test instruments (Problemsolving Heft 17 and Heft 27) constructed on the basis of theoretical analyses of 12 of Piaget's classical experiments. The problem of the present study was to explore the magnitude of developmental changes from 10 to 14 years of age in Swedish school children. A common Rasch scale was developed consisting of 14 items out of which 10 items were common to both instruments and 4 items were age specific. When this common scale was applied to separate scaling of each test instrument on the two age groups, developmental changes of more than twice the standard error were found for each item. The order of the test items within the scales was, as expected, unchanged from 10 to 14 years of age except a minor change in two items. The relative difficulties of items within each sample and between the samples were examined. Comparisons between items representing the same Piagetian construct were analyzed in regard to the constructs “all other things being equal,” equilibrium, proportionality, and reciprocal implication. Interpretations of possible explanations of the differences found are discussed. |
| Databáze: | OpenAIRE |
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