SAN JOSE, Calif. — 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 brain-wave-reading technology.
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 activated. When the mind wanders, the wand goes dark.
Engineers at NeuroSky Inc. 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.
NeuroSky’s prototype measures a person’s base-line brain-wave activity, including signals that relate to concentration, relaxation and anxiety.
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 Mr. Lee, also chief technology officer at NeuroSky, a 12-employee company founded in San Jose 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. 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,” Dr. Goldberg said. “You can use computers to improve the cognitive abilities, but it’s an art.”
The basis of many brain-wave-reading games is electroencephalography, or EEG, 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 in a research hospital might 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 is 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, said NeuroSky Chief Executive Officer Stanley Yang.
Mr. Yang is secretive about his company’s product lineup because of a nondisclosure agreement with the manufacturer. But he said an international toy manufacturer plans to introduce an inexpensive gizmo with an embedded NeuroSky biosensor at the Japan Toy Association’s trade show in late June. A U.S. version is scheduled to debut at the American International Fall Toy Show in October.
Researchers at NeuroSky and other startups also are building prototypes of toys that use electromyography (EMG), which records twitches and other muscular movements, and electrooculography (EOG), which measures changes in the retina.
While NeuroSky’s headset has one electrode, Emotiv Systems Inc. has developed a gel-free headset with 18 sensors. In addition to 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 Emotiv.
The 30-employee San Francisco company hopes to begin selling a consumer headset next year, but executives would not speculate on price. A prototype hooks up to gaming consoles such as the Nintendo Wii, Sony PlayStation 3 and Microsoft Xbox 360.
Ms. Le said the company decided in 2004 to target gamers because they would generate the most revenue — but Emotive eventually will build equipment for clinical use. The technology could enable paralyzed people to “move” in virtual realty; people with obsessive-compulsive disorders could measure their anxiety levels, then adjust medication accordingly.
The husband-and-wife team behind CyberLearning Technology LLC took the opposite approach. The San Marcos, Calif., startup targets doctors, therapists and parents of adolescents with autism, impulse control problems and other developmental disorders.
CyberLearning already is selling the SmartBrain Technologies system for the original PlayStation, PS2 and original Xbox, and soon will 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.
Users who play the race car video game “Gran Turismo” with the SmartBrain system can reach maximum speed only when they are focused. If attention wanes or players become impulsive or anxious, cars slow to a chug.
CyberLearning has sold more than 1,500 systems since early 2005. The company hopes to reach adolescents already being treated for behavior disorders.
“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.”
Please read our comment policy before commenting.