Scientists have invented a specially-equipped robot vacuum cleaner that can sense human emotions. The scientists say that the Roomba robot vacuum cleaner uses a special headband to capture bio electric signals from the forehead of a human user, and then infers stress from muscle tension readings. The system involves a control software programme that reinterprets natural muscle tension as estimating the user’s stress level, they add. “Two distinct robotic behaviours corresponding to two extreme e
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