Gaze-independent BCI-spelling using rapid serial visual presentation (RSVP)

Acqualagna, Laura; Blankertz, Benjamin

doi:10.1016/j.clinph.2012.12.050

Cited by 125 publications

(118 citation statements)

References 43 publications

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“…RSVP-based BCIs pose a very attractive alternative for the development of gaze-independent systems that are suitable for severely locked-in people with no gaze control [54], [55], [28]. Thus, we believe that the study presented can help improve BCIs aimed at communication systems by the disabled, e.g., by investigating whether the explicit use of the N2pc can help determine which column the user is focusing on.…”

Section: Discussionmentioning

confidence: 99%

Brain–Computer Interfaces for Detection and Localization of Targets in Aerial Images

Matran-Fernandez

Poli

2017

IEEE Trans. Biomed. Eng.

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Abstract-Objective. The N2pc event-related potential (ERP) appears on the opposite side of the scalp with respect to the visual hemisphere where an object of interest is located. We explored the feasibility of using it to extract information on the spatial location of targets in aerial images shown by means of a rapid serial visual presentation (RSVP) protocol using single-trial classification. Methods. Images were shown to 11 participants at a presentation rate of 5 Hz while recording electroencephalographic signals.With the resulting ERPs we trained linear classifiers for singletrial detection of target presence and location. We analysed the classifiers' decisions and their raw output scores on independent test sets as well as the averages and voltage distributions of the ERPs. Results. The N2pc is elicited in RSVP presentation of complex images and can be recognised in single trials (the median area under the receiver operating characteristic curve was 0.76 for left vs right classification). Moreover, the peak amplitude of this ERP correlates with the horizontal position of the target within an image. The N2pc varies significantly depending on handedness, and these differences can be used for discriminating participants in terms of their preferred hand. Conclusion and Significance. The N2pc is elicited during RSVP presentation of real complex images and contains analogue information that can be used to roughly infer the horizontal position of targets. Furthermore, differences in the N2pc due to handedness should be taken into account when creating collaborative brain-computer interfaces.

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Section: Discussionmentioning

confidence: 99%

Brain–Computer Interfaces for Detection and Localization of Targets in Aerial Images

Matran-Fernandez

Poli

2017

IEEE Trans. Biomed. Eng.

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“…For the Relevance Subclass LDA (RSLDA) approach, we compute a regularized mean estimate for each subclass. We apply MTS mean shrinkage for each subclass g and estimate the mean estimates for μ 1,g MTS and μ 2,g MTS , using the sample mean of the remaining subclasses as ( Acqualagna and Blankertz, 2013) shrinkage targets (see Eq. (5) and Fig.…”

Section: Implementation Detailsmentioning

confidence: 99%

Analyzing neuroimaging data with subclasses: A shrinkage approach

et al. 2016

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“…A P300 BCI is a typical example of many different BCI systems which are based on visual, audio or tactile stimuli (Fazel-Rezai, 2007;Hill et al, 2004;Jin et al, 2014;Kaufmann et al, 2014;Kim et al, 2011;Mak et al, 2011). P300 is elicited by the events that subjects consider importantly (Acqualagna and Blankertz, 2013;Farwell and Donchin, 1988;Polich, 2007). The P300 BCI was first applied to speller, in which a 6 × 6 stimuli matrix was used (Farwell and Donchin, 1988).…”

Section: Introductionmentioning

confidence: 99%