The CAGE questionnaire, the name of which is an acronym of its four questions, is a widely used screening test for problem drinking and potential alcohol problems.

Psychological test measuring sixteen traits.

a set of questions answered by the French writer Marcel Proust, and often used by modern interviewers.

The Multifactor Leadership Questionnaire is a psychological inventory consisting of 36 items pertaining to leadership styles and 9 items pertaining to leadership outcomes.

In psychology, the Eysenck Personality Questionnaire is a questionnaire to assess the personality traits of a person.