Accuracy A usability metric; the percentage of participants that can successfully complete a task (see also Effectiveness).

Acquiescence The tendency for survey respondents to agree with a question.

Assessment testing Can occur at any point in the survey development cycle; it is usually done in development’s early or middle stages, when prototypes exist for at least parts of the survey. It evaluates users’ actual behaviors—how well people can actually use the product to complete a goal. It evaluates specific components of the survey and can provide insight on the high-level design or approach as well as a design’s implementation. Also known as Summative testing.

Attention A usability metric; what people look at while completing the ...

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