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Reference Information
Title:A POMDP Approach to P300-Based Brain-Computer Interfaces
Author: Jaeyong Park, Kee-Eung Kim, Sungho Jo
Publisher: IUI '10, February 7-10, 2010 Hong Kong
Summary
The researchers of this paper discuss mind reading using EEG devices. The devices are non-invasive and explore the area of text input. Traditionally, EEG mind reading text input consists of a grid of random characters--one by one a character flashes at random. If the user was looking at the character as it flashed, the EEG would recognize which one the user selected. The problem with this is that it is random. You can't really spell things out.
The researchers propose a different algorithm that takes into account this issue as well as repetition blindness. Repetition blindness is when the system flashes the same letter immediately after or within close succession. When this occurs, it cannot differentiate between nearby letters and has to flash randomly to figure it out.
Discussion
This article was pretty interesting. I've heard of this sort of stuff before but I've never really understood how it works. It's amazing that an EEG can tell which letter you're looking at by which part of the brain fires. I don't know how practical this sort of thing will become however. I feel like I have a lot of thoughts swirling around my head all the time.
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