Critical or sensitive period. Definition

Medical Definition: critical or sensitive period

Space of time in the developmental period of each species in which individuals are especially prepared for some learning. In animals, these critical periods are limited to precise time intervals, out of which it is difficult to learn (and in some cases impossible). In humans, these critical periods are less restrictive and not at all binding. On occasion, however, that out of them, learning requires more cost (time, resources, repeats) and level of competence achieved is typically less than had been achieved in optimum time.

* Automatic translation