[Dilbert San Diego]

I think you can only do that, if you have a huge number of qualified applicants for the job, and you can afford to summarily reject someone due to that.

If you have trouble filling certain types of jobs, and/or you need someone to get into the position soon, you can’t afford to spend your time on things like this.

[nickcarraway]

I just think sometimes in an interview, people get flustered or distracted, and might not do something they normally would do. And as Persevero said, sometime in an interview it's hard to know what is appropriate.

I remember one time a hiring board said a certain candidate was not honest, because they didn't tell an interviewer he asked the same question and earlier interview did. I said candidates usually think that whatever interviewers do is intentional, not that they accidently asked the same question.

[Jonty30]

Any standard can be dispensed with, if you need the employee more than he needs you. But small psychological tests can be helpful.