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Study: Never trust a person's face
Facial expressions might not be reliable indicators of emotion, say researchers, adding that, people should never trust a person's face. According to the study, some businesses are even working on technology to determine customer satisfaction through facial expressions. "The question we really asked is: 'Can we truly detect emotion from facial articulations?' And the basic conclusion is, no, you can't," said study researcher Aleix Martinez from Ohio State University in the US.
For the findings, the researchers focused on building computer algorithms that analyse facial expressions. The researchers analysed the kinetics of muscle movement in the human face and compared those muscle movements with a person's emotions. They found that attempts to detect or define emotions based on a person's facial expressions were almost always wrong.
"Everyone makes different facial expressions based on context and cultural background," Martinez said. "And it's important to realize that not everyone who smiles is happy. Not everyone who is happy smiles. I would even go to the extreme of saying most people who do not smile are not necessarily unhappy," Martinez added.
It is also true, that sometimes, people smile out of an obligation to the social norms, the researchers said. This would not inherently be a problem, he said - people are certainly entitled to put on a smile for the rest of the world - but some companies have begun developing technology to recognize facial muscle movements and assign emotion or intent to those movements.
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