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Kail, Robert – Journal of Experimental Child Psychology, 1985
Equally divided by sex and distributed equally across fourth/fifth, eighth/ninth, and college grade levels, 144 subjects performed a mental rotation task under instructions emphasizing either accuracy or speed of response, or both. Instructions had large and consistent effects on speed of response but were not as uniformly effective in their…
Descriptors: Adolescents, Cognitive Development, Preadolescents, Reaction Time