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Object Permanence
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When a child realizes that an object out of
sight still exists
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Conservation
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Awareness that when an object changes
to different shapes, sizes, containers, or
forms the basic physical properties of the
object remain the same.
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Centration
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When a child focuses on only one aspect of an object such as the height, weight or size.
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Reversibility
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The ability to perform a mental operation and then reverse the thinking process to the original starting point, such as knowing that having 4 apples and taking two away is the same as having 2 apples and adding 2 more
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Egocentrism
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The belief a child has that everyone sees and experiences the world as they do
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Inferred reality
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To determine the true meaning or form of a situation in spite of a deceiving context. (i.e. knowing that under a car cover exists an actual car).
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Literal mindedness
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Reasoning which focuses only upon the concrete aspects of description, such as thinking ketchup is blood because it is red
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Seriation
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Arranging objects in sequential order according to height, weight, size or volume
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Transitivity
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The ability to mentally arrange objects and make comparisons between those objects
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Class inclusion
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When a child can think simultaneously about a whole class of objects and about relationship of objects to each other in the subordinate class (knowing that all four-legged animals are not dogs)
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Animism
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The belief that inanimate objects assume life-like qualities and have feelings
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