How to tell if someone is lying? Carefully. All methods of lie-detecting, including polygraph machines, are regularly fooled or used improperly, resulting in mistakes. There are a few good ways described here, but try to confirm the truth by other means as well, such as confession or investigation of the facts.
You should compare behavior in the person under suspicion to their “base” behavior, if possible. In other words, if they always have shifty eyes, then this trait can’t be considered as an indication of lying. On the other hand, if they are normally very calm under pressure, but start shifting in their chair after certain questions, that may indicate lying. Because all techniques fail at times, you should use several indications before assuming the person has lied.
How To Tell If Someone Is Lying By Testing Responses
One way to test for lying, is to measure a persons desire to avoid a subject, which will sometimes indicate dishonesty or guilt. If you think the person is lying, change the subject quickly. A lying person will often go along easily, and may even visibly relax. An innocent person is more likely to be slightly...