Attrition Can Be a Problem in Longitudinal Studies

question 16

Multiple Choice

Attrition can be a problem in longitudinal studies. This means:

• A)Participants enjoy it more the longer they are involved in the research
• B)Participants drop out over time
• C)The experimenters develop new research ideas
• D)The materials and equipment get lost over the time of the research
• E)Participants start to realise what the study is about and change their behaviour

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Definitions:

Variable Cost

Expenditures that fluctuate based on production or sales volume, for instance, materials and manpower.

Required Rate

The minimum rate of return on an investment that a manager or investor is willing to accept, considering its risk.

Marginal Tax Rate

The tax rate that applies to the last dollar of the taxpayer's income, indicating the rate of tax on any additional income earned.

Fixed Cost

Expenses that do not change with the volume of production or sales, such as rent, salaries, and insurance.