After participants have answered the questions, they receive negative feedback about their performance.

The participants answered a questionnaire and agreed to have their blood tested for viruses.

The participants answered a questionnaire soon after the earthquake experience and then another time one and a half years later.

Providing descriptions for each measurement can be found to help participants answer accurately.

The scale is simple, participants answer either yes, no, or can't decide (indicated by '?')

The participants answered 100 general knowledge questions, each with one correct answer.

"Copenhagen" makes the point that even the participants themselves couldn't answer the question.

Their Civic Exchange software will require that participants answer a few questions before they gain access to the discussion area.

In addition, participants answered more than 600 written questions and kept diaries for 24 hours.

The participants had standardized medical examinations and answered questions about their health habits, including sleep patterns.