Examlex
If either A or B must occur the events are called mutually exclusive.
Conservation of Volume
A cognitive development concept stating that a substance's volume remains unchanged even when its appearance changes, understood by children during the concrete operational stage according to Piaget.
Transitional Stage
A developmental phase where an individual moves from one significant stage to another, often involving substantial changes in behavior or role.
Piaget's Conservation Task
Piaget's Conservation Task is a cognitive exercise used by psychologist Jean Piaget to assess a child's ability to understand that quantities remain constant despite changes in shape or arrangement.
Reversibility
A mental operation in which a child realizes that one operation can be negated, or reversed, by the effects of another.
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