{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,11]],"date-time":"2026-06-11T16:39:05Z","timestamp":1781195945053,"version":"3.54.1"},"reference-count":28,"publisher":"MDPI AG","issue":"23","license":[{"start":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T00:00:00Z","timestamp":1670198400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/100014440","name":"Spanish Ministry of Science, Innovation, and Universities (MCIU)","doi-asserted-by":"publisher","award":["PID2021-127261OB-I00"],"award-info":[{"award-number":["PID2021-127261OB-I00"]}],"id":[{"id":"10.13039\/100014440","id-type":"DOI","asserted-by":"publisher"}]},{"name":"University of Malaga (Universidad de M\u00e1laga)","award":["PID2021-127261OB-I00"],"award-info":[{"award-number":["PID2021-127261OB-I00"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Rapid serial visual presentation (RSVP) is currently one of the most suitable paradigms for use with a visual brain\u2013computer interface based on event-related potentials (ERP-BCI) by patients with a lack of ocular motility. However, gaze-independent paradigms have not been studied as closely as gaze-dependent ones, and variables such as the sizes of the stimuli presented have not yet been explored under RSVP. Hence, the aim of the present work is to assess whether stimulus size has an impact on ERP-BCI performance under the RSVP paradigm. Twelve participants tested the ERP-BCI under RSVP using three different stimulus sizes: small (0.1 \u00d7 0.1 cm), medium (1.9 \u00d7 1.8 cm), and large (20.05 \u00d7 19.9 cm) at 60 cm. The results showed significant differences in accuracy between the conditions; the larger the stimulus, the better the accuracy obtained. It was also shown that these differences were not due to incorrect perception of the stimuli since there was no effect from the size in a perceptual discrimination task. The present work therefore shows that stimulus size has an impact on the performance of an ERP-BCI under RSVP. This finding should be considered by future ERP-BCI proposals aimed at users who need gaze-independent systems.<\/jats:p>","DOI":"10.3390\/s22239505","type":"journal-article","created":{"date-parts":[[2022,12,5]],"date-time":"2022-12-05T08:10:57Z","timestamp":1670227857000},"page":"9505","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Effect of Stimulus Size in a Visual ERP-Based BCI under RSVP"],"prefix":"10.3390","volume":"22","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3421-976X","authenticated-orcid":false,"given":"\u00c1lvaro","family":"Fern\u00e1ndez-Rodr\u00edguez","sequence":"first","affiliation":[{"name":"Departamento de Tecnolog\u00eda Electr\u00f3nica, Universidad de M\u00e1laga, 29071 Malaga, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Aube","family":"Darves-Bornoz","sequence":"additional","affiliation":[{"name":"Departamento de Tecnolog\u00eda Electr\u00f3nica, Universidad de M\u00e1laga, 29071 Malaga, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5235-5597","authenticated-orcid":false,"given":"Francisco","family":"Velasco-\u00c1lvarez","sequence":"additional","affiliation":[{"name":"Departamento de Tecnolog\u00eda Electr\u00f3nica, Universidad de M\u00e1laga, 29071 Malaga, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8721-0585","authenticated-orcid":false,"given":"Ricardo","family":"Ron-Angevin","sequence":"additional","affiliation":[{"name":"Departamento de Tecnolog\u00eda Electr\u00f3nica, Universidad de M\u00e1laga, 29071 Malaga, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,5]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"767","DOI":"10.1016\/S1388-2457(02)00057-3","article-title":"Brain-computer interfaces for communication and control","volume":"113","author":"Wolpaw","year":"2002","journal-title":"Clin. Neurophysiol."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"47","DOI":"10.1177\/016264340602100204","article-title":"Assistive Technology for Individuals with Disabilities: A Review and Synthesis of the Literature","volume":"21","author":"Alper","year":"2006","journal-title":"J. Spec. Educ. Technol."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"77","DOI":"10.1007\/BF00313105","article-title":"Varieties of the locked-in syndrome","volume":"221","author":"Bauer","year":"1979","journal-title":"J. Neurol."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1016\/j.neucom.2016.10.024","article-title":"Brain computer interface: Control signals review","volume":"223","author":"Ramadan","year":"2017","journal-title":"Neurocomputing"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Rezeika, A., Benda, M., Stawicki, P., Gembler, F., Saboor, A., and Volosyak, I. (2018). Brain\u2013computer interface spellers: A review. Brain Sci., 8.","DOI":"10.3390\/brainsci8040057"},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"e13569","DOI":"10.1111\/psyp.13569","article-title":"30+ years of P300 brain\u2013computer interfaces","volume":"57","author":"Allison","year":"2020","journal-title":"Psychophysiology"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"901","DOI":"10.1016\/j.clinph.2012.12.050","article-title":"Gaze-independent BCI-spelling using rapid serial visual presentation (RSVP)","volume":"124","author":"Acqualagna","year":"2013","journal-title":"Clin. Neurophysiol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"56013","DOI":"10.1088\/1741-2560\/7\/5\/056013","article-title":"Does the \u201cP300\u201d speller depend on eye gaze?","volume":"7","author":"Brunner","year":"2010","journal-title":"J. Neural Eng."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"82","DOI":"10.1186\/1743-0003-10-82","article-title":"The cost of space independence in P300-BCI spellers","volume":"10","author":"Chennu","year":"2013","journal-title":"J. Neuroeng. Rehabil."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"5","DOI":"10.3389\/fncom.2016.00005","article-title":"Exploring Combinations of Different Color and Facial Expression Stimuli for Gaze-Independent BCIs","volume":"10","author":"Chen","year":"2016","journal-title":"Front. Comput. Neurosci."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1109\/TNSRE.2019.2953975","article-title":"Speed of rapid serial visual presentation of pictures, numbers and words affects event-related potential-based detection accuracy","volume":"28","author":"Lees","year":"2020","journal-title":"IEEE Trans. Neural Syst. Rehabil. Eng."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"334","DOI":"10.1109\/TNSRE.2017.2736600","article-title":"Motion-Based Rapid Serial Visual Presentation for Gaze-Independent Brain-Computer Interfaces","volume":"26","author":"Won","year":"2018","journal-title":"IEEE Trans. Neural Syst. Rehabil. Eng."},{"key":"ref_13","doi-asserted-by":"crossref","unstructured":"Li, Q., Liu, S., Li, J., and Bai, O. (2015). Use of a green familiar faces paradigm improves P300-speller brain-computer interface performance. PLoS ONE, 10.","DOI":"10.1371\/journal.pone.0130325"},{"key":"ref_14","first-page":"7876248","article-title":"Impact of Speller Size on a Visual P300 Brain-Computer Interface (BCI) System under Two Conditions of Constraint for Eye Movement","volume":"2019","author":"Garcia","year":"2019","journal-title":"Comput. Intell. Neurosci."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"30","DOI":"10.1080\/2326263X.2018.1433776","article-title":"P300 brain-computer interface: Comparing faces to size matched non-face stimuli","volume":"5","author":"Sellers","year":"2018","journal-title":"Brain-Computer Interfaces"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"591777","DOI":"10.3389\/fnins.2020.591777","article-title":"Impact of Stimulus Features on the Performance of a Gaze-Independent Brain-Computer Interface Based on Covert Spatial Attention Shifts","volume":"14","author":"Reichert","year":"2020","journal-title":"Front. Neurosci."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"1034","DOI":"10.1109\/TBME.2004.827072","article-title":"BCI2000: A general-purpose brain-computer interface (BCI) system","volume":"51","author":"Schalk","year":"2004","journal-title":"IEEE Trans. Biomed. Eng."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"141","DOI":"10.3389\/fnhum.2019.00141","article-title":"A riemannian modification of artifact subspace reconstruction for EEG artifact handling","volume":"13","author":"Blum","year":"2019","journal-title":"Front. Hum. Neurosci."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"9","DOI":"10.1016\/j.jneumeth.2003.10.009","article-title":"EEGLAB: An open source toolbox for analysis of single-trial EEG dynamics including independent component analysis","volume":"134","author":"Delorme","year":"2004","journal-title":"J. Neurosci. Methods"},{"key":"ref_20","unstructured":"JASP Team (JASP, 2022). JASP, Version 0.16.2."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"52","DOI":"10.1080\/10447318.2011.535753","article-title":"A p300-based brain-computer interface: Effects of interface type and screen size","volume":"27","author":"Li","year":"2011","journal-title":"Int. J. Hum. Comput. Interact."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"107","DOI":"10.1016\/j.cogbrainres.2005.04.011","article-title":"Effects of mental fatigue on attention: An ERP study","volume":"25","author":"Boksem","year":"2005","journal-title":"Cogn. Brain Res."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"2245","DOI":"10.1007\/s11517-017-1671-5","article-title":"Performance improvement of ERP-based brain\u2013computer interface via varied geometric patterns","volume":"55","author":"Ma","year":"2017","journal-title":"Med. Biol. Eng. Comput."},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"108918","DOI":"10.1016\/j.jneumeth.2020.108918","article-title":"A comprehensive assessment of Brain Computer Interfaces: Recent trends and challenges","volume":"346","author":"Yadav","year":"2020","journal-title":"J. Neurosci. Methods"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"860619","DOI":"10.3389\/fcomp.2022.860619","article-title":"Editorial: Brain-Computer Interfaces for Non-clinical (Home, Sports, Art, Entertainment, Education, Well-Being) Applications","volume":"4","author":"Nijholt","year":"2022","journal-title":"Front. Comput. Sci."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"55","DOI":"10.1080\/10447318.2019.1604473","article-title":"A Dynamic User Interface Based BCI Environmental Control System","volume":"36","author":"Zhong","year":"2020","journal-title":"Int. J. Hum. Comput. Interact."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Kim, S., Lee, S., Kang, H., Kim, S., and Ahn, M. (2021). P300 brain\u2013computer interface-based drone control in virtual and augmented reality. Sensors, 21.","DOI":"10.3390\/s21175765"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"134","DOI":"10.1016\/j.neuroscience.2020.02.011","article-title":"Effects of spatial stimulus overlap in a visual P300-based brain-computer interface","volume":"431","year":"2020","journal-title":"Neuroscience"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/23\/9505\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T01:34:25Z","timestamp":1760146465000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/22\/23\/9505"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,12,5]]},"references-count":28,"journal-issue":{"issue":"23","published-online":{"date-parts":[[2022,12]]}},"alternative-id":["s22239505"],"URL":"https:\/\/doi.org\/10.3390\/s22239505","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,12,5]]}}}