Now, video game controller that senses players' emotions - Business Standard

Stanford engineers have developed what could be the next big thing in interactive gaming: video game controllers that measure the player's brain activity and change the gameplay to make it more exciting.

The prototype controller was developed by Gregory Kovacs, a professor of electrical engineering at Stanford University, in collaboration with Texas Instruments.

The main area of research by grad students in Kovacs' lab involves developing practical ways of measuring physiological signals to determine how a person's bodily systems are functioning.

Corey McCall, a doctoral candidate in Kovacs' lab, popped the back panel off an Xbox 360 controller and replaced it with a 3-D printed plastic module packed with sensors to develop the prototype.

Small metal pads on the controller's surface measure the user's heart rate, blood flow, and both the rate of breath and h ow deeply the user is breathing.

Another light-operated sensor gives a second heart rate measurement, and accelerometers measure how frantically the person is shaking the controller.

A custom-built software gauges the intensity of the game - a simple but fast-paced racing game in which the player must drive over coloured tiles in a particular sequence.

McCall can then compare all this data to generate an overall picture of the player's level of mental engagement.

The controller can provide feedback to the gaming console, which can then alter the pace of gameplay to better suit the player.

"If a player wants maximum engagement and excitement, we can measure when they are getting bored and, for example, introduce more zombies into the level," McCall said.

"We can also control the game for children. If parents are concerned that their children are getting too wrapped up in the game, we can tone it down or remind them that it's time for a heal thy break," he said.

The controller was presented at the International Consumer Electronics Show in Las Vegas in January.

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