A convincing twin of Darth Vader stalks the beige cubicles of a Silicon Valley office, complete with ominous black mask, cape and light saber.
But this is no chintzy Halloween costume. It's a prototype, years in the making, of a toy that incorporates technology that reads brain waves.
PAUL SAKUMA / Associated Press
A NeuroSky worker dressed in a Darth Vader outfit used his brain waves to control a light saber at the startup company's headquarters in San Jose.
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Behind the mask is a sensor that touches the user's forehead and reads the brain's electrical signals, then sends them to a wireless receiver inside the saber, which lights up when the user is concentrating. The player maintains focus by channeling thoughts on any fixed mental image, or thinking specifically about keeping the light sword on. When the mind wanders, the wand goes dark.
Engineers at NeuroSky have big plans for brain-wave-reading toys and video games. They say the simple Darth Vader game – a relatively crude biofeedback device cloaked in gimmicky garb – portends the coming of more sophisticated devices that could revolutionize the way people play.
Technology from NeuroSky and other startups could make video games more mentally stimulating and realistic. It could even enable players to control video game characters or avatars in virtual worlds with nothing but their thoughts.
Adding biofeedback to “Tiger Woods PGA Tour,” for instance, could mean that only those players who muster Zen-like concentration could nail a putt. In the popular action game “Grand Theft Auto,” players who become nervous or frightened would have worse aim than those who remain relaxed and focused.
NeuroSky's prototype measures a person's baseline brain-wave activity, including signals that relate to concentration, relaxation and anxiety. The technology ranks performance in each category on a scale of 1 to 100, and the numbers change as a person thinks about relaxing images, focuses intently, or gets kicked, interrupted or otherwise distracted.
The technology is similar to more sensitive, expensive equipment that athletes use to achieve peak performance. Koo Hyoung Lee, a NeuroSky co-founder from South Korea, used biofeedback to improve concentration and relaxation techniques for members of his country's Olympic archery team.
“Most physical games are really mental games,” said Lee, also chief technology officer at San Jose-based NeuroSky, a 12-employee company founded in 1999. “You must maintain attention at very high levels to succeed. This technology makes toys and video games more lifelike.”
Boosters say toys with even the most basic brain-wave-reading technology – scheduled to debut later this year – could boost mental focus and help children with attention-deficit-hyperactivity disorder, autism and mood disorders.
But scientific research is scant. Even if the devices work as promised, some question whether people who use biofeedback devices will be able to replicate their relaxed or focused states in real life, when they're not attached to equipment in front of their television or computer.
Elkhonon Goldberg, clinical professor of neurology at New York University, said the toys might catch on in a society obsessed with optimizing performance, but he was skeptical that they would reduce the severity of major behavioral disorders.
“These techniques are used usually in clinical contexts. The gaming companies are trying to push the envelope,” said Goldberg, author of “The Wisdom Paradox: How Your Mind Can Grow Stronger As Your Brain Grows Older.” “You can use computers to improve the cognitive abilities, but it's an art.”
It's also unclear whether consumers, particularly American kids, want mentally taxing games.
The basis of many brain-wave-reading games is electroencephalography, the measurement of the brain's electrical activity through electrodes placed on the scalp. EEG has been a mainstay of psychiatry for decades.
An EEG headset at a research hospital may have 100 or more electrodes that attach to the scalp with a conductive gel. It could cost tens of thousands of dollars.
But the price and size of EEG hardware are shrinking. NeuroSky's “dry active” sensors don't require gel, are the size of a thumbnail and could be put into a headset that retails for as little as $20, NeuroSky CEO Stanley Yang said.
Researchers at NeuroSky and other startups are also building prototypes of toys that use electromyography, which records twitches and other muscular movements, and electrooculography, which measures changes in the retina.
While NeuroSky's headset has one electrode, Emotiv Systems has developed a gel-free headset with 18 sensors. Besides monitoring basic changes in mood and focus, Emotiv's bulkier headset detects brain waves indicating smiles, blinks, laughter, even conscious thoughts and unconscious emotions. Players could kick or punch their video game opponent – without a joystick or mouse.
“It fulfills the fantasy of telekinesis,” said Tan Le, co-founder and president of San Francisco-based Emotiv.
The 30-person company hopes to begin selling a consumer headset next year, but executives wouldn't speculate on price. A prototype hooks up to gaming consoles such as the Nintendo Wii, Sony PlayStation 3 and Microsoft Xbox 360.
The husband-and-wife team behind CyberLearning Technology took the opposite approach. The San Marcos-based startup targets doctors, therapists and parents of adolescents with autism, impulse-control problems and other pervasive developmental disorders.
CyberLearning sells the SmartBrain Technologies system for the original PlayStation, PS2 and original Xbox, and it will soon work with the PlayStation 3 and Xbox 360. The EEG-and EMG-based biofeedback system costs about $600, not including the game console or video games.
Kids who play the race-car video game “Gran Turismo” with the SmartBrain system can only reach maximum speed when they're focused. If attention wanes or players become impulsive or anxious, cars slow to a chug.
“Our biggest struggle is to find the target market,” said co-founder Lindsay Greco, who has run treatment programs for children with attention difficulties since the 1980s. “We're finding that parents are using this to improve their own recall and focus. We have executives who use it to improve their memory, even their golf.”
