What Are The Differences Between A Within Subjects Experiment And A Between Subjects Experiment?

What Are The Differences Between A Within Subjects Experiment And A Between Subjects Experiment? Between-subjects (or between-groups) study design: different people test each condition, so that each person is only exposed to a single user interface. Within-subjects (or repeated-measures) study design: the same person tests all the conditions (i.e., all the user interfaces). What is