One section I found particularly interesting was from the emotion and motivation chapter. Posture is largely unconscious but can tell us a lot about one's emotional states. People slumped over or slouching can convey sadness while an upright posture can convey excitement or happiness. After reading this section, sometimes I look around the classroom and look at others postures and can judge their emotional state by how they are sitting. There are also many other unconscious behaviors such as hand gestures. People tend to point or move their hands fast when they are trying to highlight speech, and people tend to engage in manipulators such as when one body part makes contact repeatedly with another body part. I've noticed that when I'm studying i tend to bite my lip or twirl my hair. A lot can be told from baby language and gestures but you have to be careful not to make official conclusions based on these unconscious actions because many other variables can come into play.
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