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Using a cross-lagged-panel correlational procedure, Eron, Huesmann, Letkowitz, and Walder (1972) found evidence which suggests that
Representative Sample
A subset of a population that accurately reflects the members of the entire population, used in statistical analysis or research studies.
Sampling Frame
A list or database from which a sample is drawn for a study, representing the entire population of interest.
Reliability
Reliability is the degree to which a measurement procedure yields consistent results.
Variable
A concept that can take on more than one value.
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