Emotional Robots: Software Empowers Robots To Learn When A Person Is Sad, Happy Or Angry

The learning part is achieved through the use of artificial neural networks, which are well suited to the varied and changing inputs that ‘perceptive’ robots would be exposed to.

Using cameras and sensors, the very simple robots being built by the researchers – using mostly off-the-shelf parts – can detect different parameters, such as a person's facial expressions, voice, and proximity to determine emotional state.

The technology pulls together research in robotics, adaptive systems, developmental and comparative psychology, neuroscience and ethology, which is all about human behaviour.

Are you feeling ok?

Much like a human child, the robot learns from experience how to respond to emotions displayed by people around it.

If someone shows fear or cries out in pain, the robot may learn to change its behaviour to appear less threatening, backing away if necessary. If someone cries out in happiness, it may even detect the difference, and one day fine-tune its responses to individuals.

“It's mostly behavioural and contact feedback,” project coordinator Dr Lola Canamero is quoted as saying in a BBC News story on Feelix Growing. “Tactile feedback and emotional feedback through positive reinforcement, such as kind words, nice behaviour or helping the robot do something if it is stuck,” she said.

Maternal instinct

The three-year, Sixth Framework Programme project involves six countries and 25 specialists who are building demonstration robots as proof of concept.

One demo follows the researchers around like a young bear cub might its mother, learning from experience when to trail behind or stick close to her. A robot face is also in development which can express different 'emotions'.

The main idea is, by being more in tune with human emotions, giving the impression of empathy, the robots should be more readily accepted by the people they may one day serve.

Not exactly I Robot

Robots that can adapt to people's behaviours are needed if machines are to play a part in society, such as helping the sick, the elderly, people with autism or house-bound people, working as domestic helpers, or just for entertainment, according to Canamero.

The work is still well shy of an I Robot scenario with emotionally complex machines taking matters into their own hands, but the empathy empowering software being developed by Feelix Growing is a big step forward for robotics.