Examlex
Which of the following events does NOT occur when the semilunar valves are open?
Piaget
A Swiss psychologist known for his pioneering work in developmental psychology, especially his theory of cognitive development in children.
Object Permanence
The cognition that objects still exist even when they are no longer perceivable through sight, hearing, or other senses.
Conservation
Conservation is a principle in cognitive development, identified by Jean Piaget, referring to a child's ability to recognize that certain properties of objects, like volume and number, can remain the same despite changes in the form or arrangement of those objects.
Egocentrism
A cognitive characteristic where an individual has difficulty understanding or considering perspectives other than their own.
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