> Well certainly if I ask question A in one interview, and question A' in another, and question A' is harder and I don't pass that person, then one might be tem

> Well certainly if I ask question A in one interview, and question A' in another, and question A' is harder and I don't pass that person, then one might be tempted to argue that maybe that person would've done better on question A; therefore, I've harmed someone by 'experimenting' and making it harder for them to get a job. Rejecting someone can certainly make them depressed. > In principle this is no different from A/B testing an interview process, using real live humans no less. > So do I personally have an ethical obligation to disclose to everyone I interview that I am conducting human experimentation on them? Or is the only difference in power and scale—I am just one person, but Facebook can A/B test on millions of people at once? Generally, when interviewing, we ask the same questions of each applicant. We adjust the questions from A to A' as positions are hired, and pools are assembled, but for a specific job, each candidate gets the same questions. It would have to be different for open recruitment not tied to a specific job, but I haven't had to do that.