Sign language has a vocabulary, grammar and syntax. Non-verbal communication is explained well on this site: http://psychology.about.com/od/nonverbalcommunication/a/nonverbaltypes.htm Some aspects of sign language overlap with non-verbal communication. For example, facial expression and eye gaze carry linguistic information in signed languages, but are also part of non-verbal communication.

"Non-verbal cues", also called body language, are gestures, posture, facial expressions, etc. Sign language is a method of communication using hand movements and facial expressions.

The deaf and mute communicate by sign language. Excellent written and verbal commnuniction skills.

yeah I think so.. sign language/ non-verbal cues are include on it (non verbal communication). thanks for your feedback

Non-verbal communication is more general than sign language.