Brain Sensor for Market Research

Market researchers have long sought people's assessments of not-yet-released advertisements and products. But when people recall how they felt during a commercial, for instance, they often can't accurately describe what their reactions were at each moment in the 30-second spot. Now a San Francisco startup called Emsense claims that it has the tools needed to monitor a person's true reactions during an entire commercial or video game.

The company has developed a sensor-laden headset that tracks brain activity using a single electroencephalography sensor (EEG) at the forehead, and other sensors that monitor breathing rate, head motion, heart rate, blink rate, and skin temperature--all of which can be indicators of whether a person is engaged or excited. In addition, says Hans Lee, chief technology officer at Emsense, his team has built proprietary algorithms that find meaning from the data collected by the sensors. Founded in 2004, the company was originally developed to build an EEG-based video-game controller. (See "Connecting Your Brain to the Game.") Recently, though, the team found that using its technology for market research is more lucrative. And, as the political season ramps up, the company is testing its system internally on campaign ads.

"Our technology allows us to collect moment-by-moment metrics while avoiding the cognitive bias that can interfere with self-reporting and focus groups," says Lee. He explains that Emsense spent about four years collecting data on how viewers reacted to specific events in commercials and games, such as an intense battle scene, or a joke or a sales pitch in an ad. The company used this data to build mathematical models describing how physiological signals change in response to specific events. The technology, he claims, can let a game maker know the point at which people get sucked into a game and the point at which they lose interest. An advertiser can learn if its sales pitch comes at a time when commercial watchers have a positive or a negative feeling about the ad, Lee says.

To be sure, the idea of using biometrics to provide marketing insight isn't new. In fact, there is a fairly large body of published scientific work that correlates people's physiological responses toadvertisements by measuring skin conductance, heart rate and eye movements, says Alan Gevins, executive director of the San Francisco Brain Research Institute and president of SAM Technology, a company funded by Federal grants since 1986 to do brain research and develop technology that tests attention and memory using EEG. There are also some studies using EEG to evaluate advertising but it is a much more difficult problem technically and scientifically and the results are not that robust. "Use of EEG for this purpose is not at all ready for commercial prime time," he says. "It's really difficult."

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