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Between-Subjects Design

What is Between-Subjects Design?

A between-subjects design is a research method where participants are divided into separate groups to test different conditions of a variable. For instance, in a usability study, you could have 80 participants where each one is randomly allocated to either site A or site B. This method is often compared and contrasted with the within-subjects design, where the same participants are used across all testing conditions.

Synonyms: Cross-sectional study

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Why is Between-Subjects Design Important?

  • Elimination of Order Effects: Between-subjects design avoids biases related to task order, ensuring more reliable results.
  • Isolation of Treatment Effects: It helps isolate the effects of different conditions, providing insights into how design changes impact user experience.
  • Reduced Risk of Carryover Effects: By testing separate groups, it minimizes the influence of previous conditions on participants’ responses.

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