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Identify which of these types of sampling is used: simple random, stratified, systematic, or convenience.
-A market researcher selects 500 people from each of 10 cities.
Egocentric
A cognitive trait where an individual is unable to understand or assume the perspective of others, typically seen in early childhood development.
Perspective-taking Skills
The capacity to understand and interpret another person's thoughts, feelings, and viewpoints, distinct for its relevance across various social contexts.
Robert Selman
A psychologist known for his work on the development of social cognition in children and adolescents, including theories of perspective-taking.
Separation Anxiety Disorder
A psychological condition in which an individual experiences excessive fear or anxiety when separated from major attachment figures.
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