Examlex
The covariance measures the direction and strength of any relationship between two variables.
Logical Thinking
The process of using systematic reasoning to reach a conclusion or solve problems.
Irreversibility
In Piaget’s theory, the inability of the young child to mentally reverse an action.
Preoperational
The second stage in Piaget's theory of cognitive development, during which children start to use language to explore and understand their worlds but do not yet comprehend concrete logic.
Clay
A natural, earthy material consisting of fine-grained minerals, typically used in ceramics and construction, and known for its plasticity when wet.
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