Light on! Real world evaluation of a P300-based brain-computer interface (BCI) for environment control in a smart home.
Summary of "Light on! Real world evaluation of a P300-based brain-computer interface (BCI) for environment control in a smart home."
Brain-computer interface (BCI) systems aim to enable interaction with other people and the environment without muscular activation by the exploitation of changes in brain signals due to the execution of cognitive tasks. In this context, the visual P300 potential appears suited to control smart homes through BCI spellers. The aim of this work is to evaluate whether the widely used character-speller is more sustainable than an icon-based one, designed to operate smart home environment or to communicate moods and needs. Nine subjects with neurodegenerative diseases and no BCI experience used both speller types in a real smart home environment. User experience during BCI tasks was evaluated recording concurrent physiological signals. Usability was assessed for each speller type immediately after use. Classification accuracy was lower for the icon-speller, which was also more attention demanding. However, in subjective evaluations, the effect of a real feedback partially counterbalanced the difficulty in BCI use. Practitioner Summary: Since inclusive BCIs require to consider interface sustainability, we evaluated different ergonomic aspects of the interaction of disabled users with a character-speller (goal: word spelling) and an icon-speller (goal: operating a real smart home). We found the first one as more sustainable in terms of accuracy and cognitive effort.
Affiliation
a Biomedical Technological Department, Don Gnocchi Foundation , Via Capecelatro 66 , 20148 Milan , Italy.
Journal Details
This article was published in the following journal.
Name: Ergonomics
ISSN: 1366-5847
Pages:
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22455346
- DOI: http://dx.doi.org/10.1080/00140139.2012.661083
Medical and Biotech [MESH] Definitions
Computer Simulation
Computer-based representation of physical systems and phenomena such as chemical processes.
E1a-associated P300 Protein
A member of the p300-CBP transcription factors that was originally identified as a binding partner for ADENOVIRUS E1A PROTEINS.
Reality Testing
The individual's objective evaluation of the external world and the ability to differentiate adequately between it and the internal world; considered to be a primary ego function.
Nephelometry And Turbidimetry
Chemical analysis based on the phenomenon whereby light, passing through a medium with dispersed particles of a different refractive index from that of the medium, is attenuated in intensity by scattering. In turbidimetry, the intensity of light transmitted through the medium, the unscattered light, is measured. In nephelometry, the intensity of the scattered light is measured, usually, but not necessarily, at right angles to the incident light beam.
Surgery, Computer-assisted
Surgical procedures conducted with the aid of computers. This is most frequently used in orthopedic and laparoscopic surgery for implant placement and instrument guidance. Image-guided surgery interactively combines prior CT scans or MRI images with real-time video.
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