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A researcher created an index of substance abuse based on previous research to make sure that she captured all variables associated with the concept of substance abuse. Having multiple items allowed her to cover the entire concept. Which type of validity did she address?
Disposable Income
Income available to households after accounting for taxes and social security charges, available for spending or saving.
Gross Domestic Product
The total market value of all final goods and services produced within a country in a specific time period.
Aggregate Expenditure
This is the total spending on final goods and services in an economy, including consumption, investment, government purchases, and net exports.
Disposable Income
The budget households have for expenses and savings after income tax deductions.
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