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The way you stand when you're talking to others, how you move your feet, your hands, your eyes - even your eyebrows - says a lot about your commitment to a conversation and your underlying attitude. Your actions and stance can also affect how long you get to talk and how often you get interrupted. Even when you're seated, the position of your arms and legs provides a wealth of information about your mood and intentions, showing whether you feel dominant or submissive, preoccupied or bored. But tells aren't confined merely to conversations; when you are alone you are constantly shifting your body - and each movement, each gesture provides clues about your state of mind.