Why Is a Longitudinal Design Considered a Within-Subjects Design

question 135

Multiple Choice

Why is a longitudinal design considered a within-subjects design?

• A) Participants are measured twice, once at the beginning of the study and again at the end of the study.
• B) Participants are repeatedly measured on the dependent variable over time.
• C) Participants are measured on the dependent variable after exposure to each level of the independent variable.
• D) Fewer research participants are needed for adequate statistical power.

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Definitions:

Perfect Competitor

A theoretical market structure where many firms sell identical products, there are no barriers to entry or exit, buyers have perfect information, and firms are price takers.

Long Run

A period in economics where all factors of production and costs are variable, allowing for full industry adjustment to changes.

Perfect Competitor

A theoretical market structure where many firms offer a standardized product, there is free entry and exit, and all buyers and sellers have perfect information, leading to price being equal to marginal cost.

Long Run

A period in which all inputs can be adjusted, allowing firms to change their production capacity and industries to enter or exit markets.