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Computers

Can Brain Scans Reveal What You've Seen?

Most people view mind reading as nothing more than a cheap parlor trick, but a group of scientists hope to make the notion a reality. According to Wired, some neuroscientists from the University of California at Berkeley tracked the neural activity of test subjects who looked at an image, and then they studied the emerging patterns. Again, testers showed subjects more images, studied the results, and matched those to images from a database of more than 6 million.

Jack Gallant, one of the researchers, uses a metaphor about a magician to describe the findings. When a magician identifies the card pulled from a deck, he's seen all those cards already. That's not what Gallant and his team were doing. With their research, they have no idea what 'cards' (the images shown to the viewer) the test subject has seen. The 'magician has to figure (out the card) without ever seeing it.'

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Computers

Scientists Track Thoughts With Infrared Technology


Hate to break it to you, but that clairvoyant you've been paying daily to read you fortune cookies while blindfolded actually isn't some sort of medium. Tough to swallow, we know. That said, researchers at Canada's largest children's rehabilitation hospital are getting closer to equipping entrepreneurial individuals with the tools they need to read minds. By measuring the intensity of near-infrared light absorbed in brain tissue, scientists were able to decode a person's preference for one of two drinks with 80 percent accuracy, all without a single minute of training on the human's behalf. This research gives promise to finding out true feelings of those who can't speak or move due to physical limitations, though there's no word on how close it is to becoming viable outside of a lab. As an aside, we hear Professor X is pretty perturbed.

Computers

Scientists Inch Closer to Mind Reading


Scientists are getting closer and closer to reading your thoughts. Of course, the method uses expensive MRIs, which the subject must be completely still for, and can easily fool by thinking about something other than the target objects.

This is, however, a major advancement for researchers who are able to identify nouns a person is thinking about, even if the model for reading the patterns has never encountered the word before. The scan works by seeing what verbs are associated with the noun by sensing activity in the areas of the brain associated with different senses.

By developing a complex catalog of over a trillion nouns cross referenced with a hand full of simple verbs the computer models were able to predict what the brain scans would like for a given word. A person would then be shown two words and asked to think about one. The computer would take an image of the persons brain scan and compare it with its predictions to generate a guess as to which word the subject was thinking about. The model guessed correctly 77-percent of the time.

The method is far from perfect, but it is the first time that a clear link between the words we use and our neural activity has been shown. [Source: The Guardian]

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