View How to Interpret Body Language on Howcast

Steps 

          Step 1           Start with the eyes

1. Let’s start with the eyes. Someone who can’t maintain eye contact could be lying—or, at the very least, extremely uncomfortable. Eyes that shift downward indicate guilt or shame. Direct eye contact signals interest, focus, honesty, and confidence.
   
2. If you want to know if a person is lying, ask him to remember something. If he looks to the left when replying, he’s making it up; if he looks to the right, he’s being truthful.
   
   

   Step 2           Look for fidgeting

3. Watch for signs of fidgeting, like foot tapping: It means you’re boring the bejesus out of someone, no matter how many times he offers a polite, 'How fascinating!'
   
4. If someone you’re talking to has his legs crossed and is briskly rocking the front foot back and forth, watch out: He’s annoyed enough to give you a good swift kick.
   
   

   Step 3           Note eye focus

5. Note where a person looks when he speaks to you. If he’s looking at your lips, he’s sexually interested in you. If he’s focusing on your forehead, he thinks you’re a dope.
   
6. When a person is romantically interested in you, his eyes will be shiny because his glands will secrete a liquid that glazes them.
   
   

   Step 4           Observe head tilts

7. Observe head tilts. A person who feels superior to you will keep his head tilted back slightly. A head slanted forward means the person is being judgmental or harboring negative feelings. A tilt to the side indicates interest.
   
8. If two people are talking face-to-face, with their hips aligned, don’t interrupt them—they are absorbed in their discussion and not open to interlopers.
   
   

   Step 5           Watch the digits

9. Watch how the person uses his fingers. If his thumb is under his chin, with his index finger pointing vertically along the cheek, he’s not buying what you’re selling. If his hand is blocking his mouth, he may be lying.
   
10. If you want someone to like you, observe his posture and body movements and mimic them. When people are getting along, they unconsciously begin 'mirroring' each other. Studies show you can nudge this camaraderie along by doing it intentionally.
    
    

    Step 6           Analyze like a pro

     

    Remember three rules:

    1.Put the gesture in context (a person may be tapping his foot because it’s asleep);
    2.Тrack patterns (some people are always fidgety);
    3.Study clusters (one sign of lying is not proof, but several make a good case).

View How to Detect a Lie on Howcast

Steps 

Step 1           Watch their hands 

Watch the suspected liar’s hands. Body language studies show that people tend to touch their face and scratch their nose when they lie.

Step 2           Follow their eyes  

Follow their eyes. Liars tend to blink a lot and don’t maintain eye contact. 

Step 3           Note their words 

Note their words. A liar will skip contractions--saying 'I did not' instead of 'I didn’t'--and avoid pronouns, using someone’s full name instead of 'he' or 'she.'

Step 4           Check their smile 

Check their smile. People who are telling the truth use many facial muscles, but liars smile with just their mouth. 

Step 5            Note their posture 

Notice their posture. Liars tend to keep their body posture closed (by folding their arms, for example). They may also unconsciously put an object between you, like a cup of coffee. 

Step 6           Pause before responding 

Pause momentarily before responding; if the silence makes them uncomfortable, they may be lying. 

Step 7           Note the details 

Pay attention to details. If they provide more information than necessary, that’s a bad sign. People tend to be overly specific when they’re making something up.

Step 8            Change the subject 

Change the subject. If they seem relieved, that’s probably a red flag that they’ve been lying straight to your face!

 Step 9            Teach your liar a lesson

What you do from here is up to you. It may be smart to file your knowledge away for future use. However, if you're noticing a trend, it might just be time to teach your liar a lesson.

 In a recent poll, 91% of Americans reported lying on a regular basis.