Examlex
Describe the four primary stages of Jean Piaget's theory of cognitive development.
Experimental Group
In an experiment, the group receiving the treatment under study.
Control Group
In an experiment, a group of people, similar to those in the experimental group, who do not receive the treatment under study.
Cause and Effect
A relationship where one event (the cause) makes another event happen (the effect).
Random Selection
A method of sampling in which participants are chosen from a larger population entirely by chance, ensuring that every individual has an equal probability of being selected.
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