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Economic has affected bread-winning and consumption in American families.
Laboratory Experiments
Controlled tests or investigations conducted in a lab setting where variables are closely controlled to explore scientific processes or effects.
Internal Validity
The extent to which a research study can demonstrate that a causal relationship exists between the independent and dependent variables, free from confounding variables.
External Validity
The degree to which a study's findings can be applied to other contexts and different individuals.
Validity
The extent to which a test, measurement, or study accurately reflects or assesses the specific concept it is intended to measure.
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