Abstract
This study investigated the relationship among the acquisition of mathematics achievement and the abilities of conservation, seriation, and classification. Native Nigerian children, ages 4 to 8 yr. (N = 120), were subjects. Data showed (a) moderate to high relationships of mathematics achievement and conservation, seriation, and classification abilities, (b) few sex differences either on the mathematics achievement test or on the performance of the various Piagetian tasks, and (c) that the operational stage is attained around the age 8 rather than somewhat earlier as we expected.
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