http://www.economist.com/news/science-a ... r-will-see
ELLIE is a psychologist, and a damned good one at that. Smile in a certain way, and she knows precisely what your smile means. Develop a nervous tic or tension in an eye, and she instantly picks up on it. She listens to what you say, processes every word, works out the meaning of your pitch, your tone, your posture, everything. She is at the top of her game but, according to a new study, her greatest asset is that she is not human.
When faced with tough or potentially embarrassing questions, people often do not tell doctors what they need to hear.
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