For most studies, you’ll be asked to fill out a screening questionnaire so we can make sure we’re reaching the target our clients want to reach. Public health and market research requires that we speak to a wide variety of different people who have different experiences whether as a member of a demographic group, a user of a particular product or service or people with specific healthcare issues.
For marketing research we’ll often want to hear from both users and non-users of brands to help companies do a better job. For public health research we’ll want to hear from different demographic groups and people with different experiences when it comes to health, to ensure that our clients, the public agencies, are hearing from different kinds of people.