非言語コミュニケーション
Nonverbal communication helps people express their emotions, attitudes, and personalities. The most dominant form of nonverbal communication is the use of facial expressions to channel different emotions. Greatly influenced by Charles Darwin's research on facial expressions and book "The Expression of the Emotions in Man and Animals (1872)", it is believed that all humans, regardless of culture or race, encode and decode the six "primary" emotions, (happiness, sadness, anger, fear, surprise, and disgust), universally in the same way. To encode means to communicate nonverbal behavior, while to decode means to interpret the meaning or intention of the nonverbal behavior. Decoding sometimes is inaccurate due to affect blend, (a facial expression with two differently registered emotions), and/or display rules, (culturally dictated rules about which nonverbal behaviors are acceptable to display). Other nonverbal cues such as: body language, eye contact, and vocal intonations can affect social perception by allowing for thin-slicing. Thin-slicing describes the ability to make quick judgements from finding consistencies in events based only on narrow frames of experience.