The Science of Persuasion by Cialdini provided some ideas.
If a person who you intend to hire is told that you expect something from them, they might actually make no commitment to do that. For example, If you say, "We expect our employees to take only 10 minute coffee breaks", when they are caught taking longer breaks, they will feel no shame in that. They never said they wouldn't.
However, if you ask them if they will take only 10 minute coffee breaks, and wait for the answer, they have made a commitment to do that. Then, when they are caught taking longer breaks, they can be shamed with, "you said you would take only 10 minute breaks and you didn't live up to your promise".
Are there trade-related questions that should be asked?
