Qualitative user-studies

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Typical for qualitative user studies is their reliance on rich data from few test participants. These types of studies are often used as formative evaluation. Results of qualitative user studies are typically not statistically validated, and therefore the generalizability of the results is limited. On the other hand, the depth of evaluation makes it ideal for quick design iterations of prototype systems.

Formative methods include think-aloud user studies, heuristic evaluation, and cognitive walkthrough.