Examlex
Placebos are only effective for psychological conditions like anxiety and depression.
Preoperational
The stage in Piaget's theory of cognitive development in which children from about 2 to 7 years old develop memory and imagination, but do not yet think logically.
Formal Operational Thought
A stage of cognitive development in which individuals are able to think abstractly, reason logically, and manage problems systematically.
Logical
Pertaining to the use of reason and sound judgment in thinking or arguing.
Abstract
A brief summary of a research article, thesis, review, or other long report on a subject or project.
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