Summarize this article:

Pick a specific day to profile a person. Observe their speech patterns and hand motions throughout the day. Does this behavior match up with how the person usually acts? If so, you can profile that the individual is in a normal mood, and not behaving any differently than they normally would.  For instance, if an expressive person starts hiding their hands in a conversation, you can profile that they aren’t being completely honest or open. Try to identify large changes in a person’s speech. If they start speaking casually to someone they usually use formal language with, you can assume that the person is in a friendly mood, or that they are becoming friends with the other individual. Watch how the person carries themselves throughout the day. Observe your profiling target when they’re moving as well as when they’re standing still. If their posture seems sloppy or closed off, you can profile the person as upset or uncomfortable, depending on the circumstance. If the person seems confident and relaxed, you can profile that the individual in question feels comfortable.   Posture can also be situational in different conversations. If a person is speaking with someone that they don’t like, their posture will reflect that. For instance, a person will lean away from someone that they’re not close or friendly with. Watch your profiling target as you speak with them, or as they speak with others. Pay attention to their eye movement as the conversation continues. Is the person able to maintain firm and comfortable eye contact, or is their gaze fleeting and downcast? If an individual isn’t willing to make eye contact, you can profile that they’re nervous and uncomfortable in the conversation. If a person can’t make consistent eye contact, it might mean that they’re hiding something. Speak with the person that you’re profiling, and take note of their intonation as they reply. Does the person speak in a normal, relaxed tone of voice? Note if your profiling target is mumbling, or if their speech seems more stiff and irritated than usual. Then, try drawing conclusions based on these different vocal cues. For instance, if a person’s voice sounds rigid, they might be irritated or uncomfortable with some aspect of the conversation.

Summary:
Compare someone's words and gestures to their baseline behaviors. Examine their physical movement and posture for deviations. See if the person is willing to make eye contact. Listen for any differences in their tone of voice.