Piaget used the three-mountain task to assess children's level of
A) conservation.
B) egocentrism.
C) seriation.
D) class inclusion.

Question

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The three-mountain task is commonly used to assess children's level of egocentrism, which is the inability to take another person's perspective into account. Conservation refers to the understanding that certain physical characteristics of objects (such as volume or number) remain the same even when superficial changes occur, while seriation refers to the ability to arrange objects in a logical order or series. Class inclusion involves the understanding that a category (such as "animals") can have multiple subcategories (such as "dogs" and "cats") and that objects can belong to multiple categories at once.

Piaget Used the Three-Mountain Task to Assess Children's Level of