Screener surveys: how researchers find the right people

1A screener is the short questionnaire that decides who gets into a research study, and with it the session, the incentive and the chance to shape a product. 2The strongest screeners ask what people actually do and know rather than only who they are, because demographics alone let in people who never face the problem being studied. 3They also hide the target by placing the real behaviour in a list of ordinary options, often beside one or two believable fakes (called foils) that only a guesser would pick, instead of asking a yes/no question that signals the "right" answer. 4Order matters as well: deal-breaker questions go first, optional demographics go last, and several guides suggest about seven to ten questions so good candidates don't give up halfway. 5Because no single question catches every bluff, careful teams layer their checks with an open question that tests real knowledge, matching answers to similar questions, and a quick re-screen call before the session. 6For participants the lesson runs the other way: answer honestly and specifically, because screeners are built to reward people who really fit, and a bluff that slips through tends to show fast once a live session starts asking follow-up questions.