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ERIC Number: EJ179714
Record Type: Journal
Publication Date: 1977
Pages: N/A
Abstractor: N/A
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Controlling Variables: Assessing Levels of Understanding
Wollman, Warren
Science Education, 61, 3, 371-83, Jul-Sep 77
A colliding spheres type of experiment is used with several hundred 4-12 grade students to test for knowledge of the concept of controlling variables. Results support the contention that the concept is developed gradually during the concept stage but not fully attained until around 14 years of age. (CP)
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