Title :
An exploratory study of factors affecting single trial P300 detection
Author :
Jansen, Ben H. ; Allam, Anand ; Kota, Prashant ; Lachance, Kathleen ; Osho, Ayokunle ; Sundaresan, Karthik
Author_Institution :
Dept. of Electr. Eng., Houston Univ., TX, USA
fDate :
6/1/2004 12:00:00 AM
Abstract :
A threshold detector for single-trial P300 detection has been evaluated. The detector operates on the 0-4 Hz band, isolated from the raw electroencephalogram using low-pass filtering, wavelet transforms, or the piecewise prony method (PPM). A detection rate around 70% was found, irregardless of stimulus type, interstimulus interval (ISI), probability of occurrence (Pr) of the target stimuli, intrasession and intrasession effects, or filtering method. This suggests that P300-based brain-machine interfaces can use an ISI as short as 1 s and a Pr of 45%, to increase throughput.
Keywords :
bioelectric potentials; electroencephalography; handicapped aids; low-pass filters; medical computing; medical signal detection; neurophysiology; wavelet transforms; 0 to 4 Hz; P300-based brain-machine interfaces; electroencephalogram; intersession effects; interstimulus interval; intrasession effects; low-pass filtering; occurrence probability; piecewise prony method; single trial P300 detection; stimulus type; threshold detector; wavelet transforms; Brain; Delay; Detectors; Filtering; Helium; Intersymbol interference; Low pass filters; Signal to noise ratio; Throughput; Wavelet transforms; Adult; Algorithms; Diagnosis, Computer-Assisted; Electroencephalography; Event-Related Potentials, P300; Feasibility Studies; Female; Humans; Male; Pilot Projects; Reproducibility of Results; Sensitivity and Specificity;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2004.826684
