It is commonplace in philosophy and psychology to divide emotions into two groups: basic and complex emotions. Complex emotions, such as grief, regret, and jealousy, have highly variable appearances ...

Emotions are related to mood, personality and motivation, and they cause measurable physiological and psychological changes. The study of emotions and feelings is important because they are at the ...

Engineers at the Huazhong University of Science and Technology in Wuhan, Hubei province, have developed a breakthrough ...