Examlex
A secondary reinforcer gains its value from association with a primary reinforcer.
Cross-sectional Design
A research methodology that examines a population, or a representative subset, at a single point in time to make inferences about the population at that time point.
Age Differences
Variations in behaviors, abilities, experiences, or preferences that occur due to differences in individuals' ages.
Short Period
Refers to a brief duration of time, typically used in various contexts to indicate a limited time frame.
Longitudinal
Referring to research or studies that collect data on the same subjects repeatedly over a period of time.
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