Examlex
Simplify the following.
Cohort
A group of individuals sharing a significant common characteristic, often utilized in studies to examine specific outcomes over a time period.
Cross-Sectional Study
An observational type of study that analyzes data from a population, or a representative subset, at a specific point in time.
Random Sample
A method of selecting individuals from a population where each has an equal chance of being chosen, ensuring the sample's representativeness.
Preoperational Stage
The second stage in Piaget's theory of cognitive development, where children aged 2-7 years begin to think symbolically but are not yet able to perform operations, or reversible mental actions.
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