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What Children Do in Spite of What They Know T. G. Bever, J. Mehler and J. Epstein
Copyright@1968 by the American Association for the Advancement of Science
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What Children'Do in Spite of What They Know Ab~tr:tct. New studies support th(' tr).'pnthesis that young children have baric cognitil'e capacities hilt utilize them inefficiently; older childrell aid the.fc capacities with generally valid cognitive heuri.rtics which produce poor performance on critical prohlem.r.
In a prcv;olls study of cognitive development we found that children of 2 years 6 months can successfully rec-' ognizc a numerical equality and its transformation into an inequality whereas older children temporarily lose this capacity. We interpreted our results as demonstrating that the capacity to con~erve relations between stimuli in the fac(~ of transformations is present in the 2-year-old; the older child loses this capacity temporarily due to an overdcpendence on perceptual generalizations (for example. "if a row looks longer, it has more components in it"). This ihterprctation conflicts with the positir.1 that the ability to conserve numerical relations between stimuli first appears at ahout 5 to 6 years (I). Bei!in--, critique of our previous study contains three general points: (i) ,nlr stlldy \\'a~ not a direct test of the .::hild's capacity to conserve: (ii) his exp,'rimental evidence indicate
