Examlex
Government goods are delivered "free," which means that they are costless.
Contact Comfort
The physical and emotional comfort that an infant derives from being in close physical contact with its caregiver.
Longitudinal
A type of study in which data from the same subjects is gathered for a prolonged period of time to observe changes or outcomes.
Cross-Sectional
In research, a study that examines a population or a phenomenon at a single point in time, allowing for snapshot comparisons.
Centration
A cognitive limitation in early childhood thinking, where a child focuses on one aspect of a situation, neglecting other important features.
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