When people are in a certain mood, whether elation or depression, that mood is often communicated to others. When we are talking to someone who is depressed it may make us feel depressed, whereas if we talk to someone who is feeling self-confident and buoyant we are likely to feel good about ourselves. This phenomenon, known as emotional contagion, is identified here, and compelling evidence for its affect is offered from a variety of disciplines - social and developmental psychology, history, cross-cultural psychology, experimental psychology, and psychopathology.
Recently, scholars from a wide variety of disciplines, using a variety of scientific techniques, have begun to study the influence of attention, facial mimicry, and social context on emotional contagion. In this paper we will review the classic evidence documenting the role of attention, facial mimicry, and feedback in sparking primitive emotional contagion. Then we will discuss the new evidence which scholars have amassed to help us better understand the role of facial mimicry in fostering contagion and the ability to "read" others' thoughts, feelings, and emotions. Finally, we will briefly speculate as to where future research might be headed.
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