Showing papers by "Marco Congedo published in 2006"
TL;DR: The proposed method is favourable over existing classification methods based on an EEG inverse solution, which rely either on iterative algorithms for single-trial independent component analysis or on trained classifiers.
Abstract: We couple standardized low-resolution electromagnetic tomography, an inverse solution for electroencephalography (EEG) and the common spatial pattern, which is here conceived as a data-driven beamformer, to classify the benchmark BCI (brain-computer interface) competition 2003, data set IV. The data set is from an experiment where a subject performed a self-paced left and right finger tapping task. Available for analysis are 314 training trials whereas 100 unlabelled test trials have to be classified. The EEG data from 28 electrodes comprise the recording of the 500 ms before the actual finger movements, hence represent uniquely the left and right finger movement intention. Despite our use of an untrained classifier, and our extraction of only one attribute per class, our method yields accuracy similar to the winners of the competition for this data set. The distinct advantages of the approach presented here are the use of an untrained classifier and the processing speed, which make the method suitable for actual BCI applications. The proposed method is favourable over existing classification methods based on an EEG inverse solution, which rely either on iterative algorithms for single-trial independent component analysis or on trained classifiers.
113 citations
TL;DR: In a virtual environment, it is observed that spatial delocation promotes visual dominance when judging the rotation angle of a hand-operated handle and the delocation of perceptual information appears to increase considerably the weight of the dominant sense at the expense of the other.
Abstract: How do we perceive objects when what we see and what we touch is not at the same place? In a virtual environment, we observed that spatial delocation promotes visual dominance when judging the rotation angle of a hand-operated handle. Thus, the delocation of perceptual information appears to increase considerably the weight of the dominant sense at the expense of the other. We relate this result to the design of teleoperation and virtual reality systems, in which, typically, the visual and haptic sensory information originates in spatially distinct devices.
26 citations