By
eHow Relationships & Family Editor
Difficulty: Moderately Challenging
Step1
Look the other person in the eye. Ideally, you should sit or stand directly in front of the person you're talking to, so that you get a good view of her eyes. Try not to be too obvious by staring; simply make eye contact like you would with any other person.
Step2
Stick to surface streets at first. Since everyone reacts differently, you should start off by asking simple questions that the other person would answer truthfully. You can ask him what he had for lunch, for instance, and pay attention to where his eyes move during his answer.
Step3
Move on to more difficult questions whose answers might be less straightforward--or possibly embarrassing--and see if the other person's eyes move differently than before.
Step4
See the signs. Generally speaking, someone looks to the top left when answering a question if she's recalling a memory. So she's probably telling the truth then. When she looks to the top right, however, she's accessing the creative part of her brain, which means that she's probably making up a lie to tell you.