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vertical décalage

in Piagetian theory, the invariable sequence in which the different stages of development (sensorimotor, preoperational, concrete operational, formal operational) are attained. Compare horizontal décalage.

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May 9th 2024

reciprocal

reciprocal

n. the number that when multiplied by another number gives a result of 1. The reciprocal of x is therefore 1/x and that of 1/x is x. So, for example, 1/4 is the reciprocal of 4.