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Evaluating the Effect of Stimuli Color and Frequency on SSVEP

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Evaluating the Effect of Stimuli Color and Frequency on SSVEP

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dc.contributor.author Duart, Xavier es_ES
dc.contributor.author Quiles Cucarella, Eduardo es_ES
dc.contributor.author Suay, Ferran es_ES
dc.contributor.author Chio, Nayibe es_ES
dc.contributor.author García Moreno, Emilio es_ES
dc.contributor.author Morant Anglada, Francisco José es_ES
dc.date.accessioned 2024-02-15T19:01:38Z
dc.date.available 2024-02-15T19:01:38Z
dc.date.issued 2021-01 es_ES
dc.identifier.uri http://hdl.handle.net/10251/202677
dc.description.abstract [EN] Brain-computer interfaces (BCI) can extract information about the subject's intentions by registering and processing electroencephalographic (EEG) signals to generate actions on physical systems. Steady-state visual-evoked potentials (SSVEP) are produced when the subject stares at flashing visual stimuli. By means of spectral analysis and by measuring the signal-to-noise ratio (SNR) of its harmonic contents, the observed stimulus can be identified. Stimulus color matters, and some authors have proposed red because of its ability to capture attention, while others refuse it because it might induce epileptic seizures. Green has also been proposed and it is claimed that white may generate the best signals. Regarding frequency, middle frequencies are claimed to produce the best SNR, although high frequencies have not been thoroughly studied, and might be advantageous due to the lower spontaneous cerebral activity in this frequency band. Here, we show white, red, and green stimuli, at three frequencies: 5 (low), 12 (middle), and 30 (high) Hz to 42 subjects, and compare them in order to find which one can produce the best SNR. We aim to know if the response to white is as strong as the one to red, and also if the response to high frequency is as strong as the one triggered by lower frequencies. Attention has been measured with the Conner's Continuous Performance Task version 2 (CPT-II) task, in order to search for a potential relationship between attentional capacity and the SNR previously obtained. An analysis of variance (ANOVA) shows the best SNR with the middle frequency, followed by the low, and finally the high one. White gives as good an SNR as red at 12 Hz and so does green at 5 Hz, with no differences at 30 Hz. These results suggest that middle frequencies are preferable and that using the red color can be avoided. Correlation analysis also show a correlation between attention and the SNR at low frequency, so suggesting that for the low frequencies, more attentional capacity leads to better results. es_ES
dc.language Inglés es_ES
dc.publisher MDPI AG es_ES
dc.relation.ispartof Sensors es_ES
dc.rights Reconocimiento (by) es_ES
dc.subject Brain-Computer Interface es_ES
dc.subject Electroencephalography es_ES
dc.subject Biomedical signal processing es_ES
dc.subject SSVEP es_ES
dc.subject.classification INGENIERIA DE SISTEMAS Y AUTOMATICA es_ES
dc.title Evaluating the Effect of Stimuli Color and Frequency on SSVEP es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3390/s21010117 es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingenieros Industriales - Escola Tècnica Superior d'Enginyers Industrials es_ES
dc.contributor.affiliation Universitat Politècnica de València. Escuela Técnica Superior de Ingeniería del Diseño - Escola Tècnica Superior d'Enginyeria del Disseny es_ES
dc.description.bibliographicCitation Duart, X.; Quiles Cucarella, E.; Suay, F.; Chio, N.; García Moreno, E.; Morant Anglada, FJ. (2021). Evaluating the Effect of Stimuli Color and Frequency on SSVEP. Sensors. 21(1). https://doi.org/10.3390/s21010117 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion https://doi.org/10.3390/s21010117 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 21 es_ES
dc.description.issue 1 es_ES
dc.identifier.eissn 1424-8220 es_ES
dc.identifier.pmid 33375441 es_ES
dc.identifier.pmcid PMC7796402 es_ES
dc.relation.pasarela S\424616 es_ES
dc.subject.ods 03.- Garantizar una vida saludable y promover el bienestar para todos y todas en todas las edades es_ES


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