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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