Valid market research often requires deception. If the test subjects know what the test is, their behavior isn&#x27;t indicative of real-world behavior. For example, a market test for magazines might leave them in the &quot;waiting room&quot; for a taste test of cookies. There&#x27;s no ethical problem in that.<p>Whatever the problems with Milgram&#x27;s experiments as experiments that show quantifiable results, they are a compelling exercise in investigators&#x27; prejudices and an exploration is how easy it is to put someone in a position of petty authority and elicit cruelty to the point of torture in them.<p>We ought to be refining Milgram&#x27;s experiment designs, and designing the working environment of police to counter those effects that are measured.