> If a scientist offers subjects $10 for participating, the scientist must pay that $10 to anyone who declines the consent form. Any resources I can learn more

> If a scientist offers subjects $10 for participating, the scientist must pay that $10 to anyone who declines the consent form. Any resources I can learn more about this? An acquaintance of mine runs a research group at a university, designing and executing survey instruments for other groups. Periodically asks me to help her with leveraging Facebook Ads for participant recruitment when her traditional targeting means falls short (generally surveys that need participants less than ~35, but sometimes for other unique targeting requirements). The ads usually advertise a gift card for qualifying and participating, and the only branch of the survey that includes the gift card portion is the one where participants both complete the survey and don't get routed out by the initial qualifier questions. The recruitment ad copy, the survey instruments, etc all have to go through IRB approval, so I assumed that process was all above board.