Between-Subjects vs. Within-Subjects Study Design
Summary: In user research, between-groups designs reduce learning effects; repeated-measures designs require fewer participants and minimize the random noise.
When you want to compare several user interfaces in a single study, there are two ways of planning your study:
(Note that here we use the word “design” to refer to the design of the study , and not to website design. The design of the study is also called experimental design .)
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