26 research outputs found
An Auditory Paradigm for Brain-Computer Interfaces
Motivated by the particular problems involved in communicating with "locked-in" paralysed patients, we aim to develop a brain-computer interface that uses auditory stimuli. We describe a paradigm that allows a user to make a binary decision by focusing attention on one of two concurrent auditory stimulus sequences. Using Support Vector Machine classification and Recursive Channel Elimination on the independent components of averaged event-related potentials, we show that an untrained user's EEG data can be classified with an encouragingly high level of accuracy. This suggests that it is possible for users to modulate EEG signals in a single trial by the conscious direction of attention, well enough to be useful in BCI
Attentional Modulation of Auditory Event-Related Potentials in a Brain-Computer Interface
Motivated by the particular problems involved in communicating with "locked-in" paralysed patients, we aim to develop a brain-computer interface that uses auditory stimuli. We describe a paradigm that allows a user to make a binary decision by focusing attention on one of two concurrent auditory stimulus sequences. Using Support Vector Machine classification and Recursive Channel Elimination on the independent components of averaged event-related potentials, we show that an untrained user‘s EEG data can be classified with an encouragingly high level of accuracy. This suggests that it is possible for users to modulate EEG signals in a single trial by the conscious direction of attention, well enough to be useful in BCI
Attentional modulation of auditory event-related potentials in a brain-computer interface
Motivated by the particular problems involved in communicating with “locked-in ” paralysed patients, we aim to develop a brain-computer interface that uses auditory stimuli. We describe a paradigm that allows a user to make a binary decision by focusing attention on one of two concurrent auditory stimulus sequences. Using Support Vector Machine classification and Recursive Channel Elimination on the independent components of averaged event-related potentials, we show that an untrained user's EEG data can be classified with an encouragingly high level of accuracy. This suggests that it is possible for users to modulate EEG signals in a single trial by the conscious direction of attention, well enough to be useful in BCI
Usefulness as the Criterion for Evaluation of Interactive Information Retrieval
The purpose of an information retrieval (IR) system is to help
users accomplish a task. IR system evaluation should consider
both task success and the value of support given over the entire
information seeking episode. Relevance-based measurements fail
to address these requirements. In this paper, usefulness is
proposed as a basis for IR evaluation
Usefulness as the Criterion for Evaluation of Interactive Information Retrieval
The purpose of an information retrieval (IR) system is to help
users accomplish a task. IR system evaluation should consider
both task success and the value of support given over the entire
information seeking episode. Relevance-based measurements fail
to address these requirements. In this paper, usefulness is
proposed as a basis for IR evaluation