What Are Emotion Expressions For?

@article{Shariff2011WhatAE,
  title={What Are Emotion Expressions For?},
  author={Azim F. Shariff and Jessica L. Tracy},
  journal={Current Directions in Psychological Science},
  year={2011},
  volume={20},
  pages={395 - 399}
}
Although research on the nonverbal expression of emotion has played a prominent role throughout psychology during the past two decades—including an instrumental role in the development of contemporary evolutionary psychology—little research has focused on the evolutionary origins and functions of the emotional expressions themselves. However, recent findings from psychophysical, comparative, social, and cross-cultural psychology are converging to produce a compelling functionalist account… 

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