The field of nonverbal communication or body language is considered as a science of psychology. It is not so difficult to understand, but requiring readers follow some tips.

Focusing on inconsistencies:
In order to communicate successfully, you should pay attention to the gesture of partners instead of their words. It means that body language can express a part of communication meaning. For instance, it is very low probable that someone agrees to your opinion by frowning.

Connecting the nonverbal meaning:
You should not read a single nonverbal signal. It is better if you can collect all the nonverbal signs before translating them to the original meaning, including eyes contact, attitude, and other behaviors.

Trust your feeling:
Do not forget your intuition. If you doubt about someone’s words, you should guess them through both of verbal and nonverbal signs.

For instance, it is very low probable that someone agrees to your opinion by frowning.Are you sure ??? I think it means that they do not agree with you. Watch for changes in response to your communications. Also spot mixed messages for when the voice says one thing body says another—this can be a sign of attempted deception.