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The Effects of Eye Tracking in a VR Helmet on EEG Recordings
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@TechReport{Bayliss:TR98,
  author = 	 {Jessica D. Bayliss and Dana H. Ballard},
  title = 	 {The Effects of Eye Tracking in a VR Helmet on EEG Recordings},
  institution =  {Comp. Sci. Dept. University of Rochester},
  year = 	 {1998},
  number = 	 {685},
  address = 	 {Rochester NY},
  month = 	 {May},
  abstract =     { #
Since scalp EEG recordings are measured in microvolts, electrical signals may 
easily interfere during an experiment. As Spehlmann discusses, such interference
 may be introduced through the lights in the recording room, a nearby television, 
or even a computer monitor [Spehlmann, 1991]. Thus, when we consider 
performing EEG/EP/ERP experiments within a virtual reality helmet containing 
an eye tracker, electrical interference becomes a real possibility. We tested 
the effects of wearing a VR4 virtual reality (VR) helmet containing an ISCAN 
eye tracker while asking subjects to do a continuous performance task. The 
results of this task were then analyzed in the frequency domain and compared 
to results from the same experiment while looking at a computer screen in two 
different environments. Results indicate that in an environment with other 
computers, the vertical refresh from the back of a nearby row of computer 
monitors added more noise to the signal than wearing the VR helmet and eye 
tracker. Even in an environment without other computers, the noise while w
earing the VR helmet and eye tracker is not significantly different from the 
noise obtained while viewing a laptop computer screen in the same location.   }
  
}