The robotic Replicants in Blade Runner were indistinguishable from humans except for their lack of empathy. Now researchers are creating virtual humans that can detect human emotions through non-verbal cues and develop appropriate responses. This could lead to artificial life forms who are not only intelligent, but empathic as well.
Catherine Pelachaud develops virtual humans, called Embodied Conversational Agents (ECAs) at the Paris Institute of Technology. Pelachaud has found that people frequently lose interest in ECAs because they don’t seem sufficiently human. To create ECAs that keep human conversationalists engaged, her team is developing a virtual human that will recognize and respond to human emotions. They are training ECAs to detect emotional expressions via webcam, and studying how flesh and blood humans react to the virtual humans’ responses. They are hoping that this will improve the way that humans interact with virtual agents:
Pelachaud said this could be useful in applications where a person is seeking information from the agent. If the agent gets it wrong and detects the person becoming upset, it could show empathy through nonverbal signs, and this could help reduce the frustration the person feels, Pelachaud said.
"Having an agent that shows empathy can enhance the relationship between a user an agent," she said. "The user may still not get the information, but at least they won't feel so negative from the the interaction."
Greta, an ECA the team is training to become empathic, seems to be the antithesis of the character program “E,” which a team at Rensselaer is using to study computer-generated evil.
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