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Longitudinal Research
involves studies conducted over a lengthy period, allowing researchers to observe developments or changes in the subjects over time.
Cross-Sectional Research
A study design that analyzes data collected from a population, or a representative subset, at one specific point in time.
Piaget
Jean Piaget was a Swiss psychologist known for his pioneering work in child development, particularly his theory of cognitive development, which describes how children construct a mental model of the world.
Developmental Psychologists
Developmental psychologists study the psychological growth and changes that occur throughout a human life span, including emotional, cognitive, and social development.
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