EEG in the classroom: Synchronised neural recordings during video presentation

We performed simultaneous recordings of electroencephalography (EEG) from multiple students in a classroom, and measured the inter-subject correlation (ISC) of activity evoked by a common video stimulus. The neural reliability, as quantified by ISC, has been linked to engagement and attentional modulation in earlier studies that used high-grade equipment in laboratory settings. Here we reproduce many of the results from these studies using portable low-cost equipment, focusing on the robustness of using ISC for subjects experiencing naturalistic stimuli. The present data shows that stimulus-evoked neural responses, known to be modulated by attention, can be tracked in for groups of students with synchronized EEG acquisition. This is a step towards real-time inference of engagement in the classroom.Comment: 14 pages, 5 figures, 3 tables. Preprint version. Revision of original preprint. Supplementary materials added as ancillary fil

Microstate EEGlab toolbox: An introductory guide

EEG microstate analysis offers a sparse characterisation of the spatio-temporal features of large-scale brain network activity. However, despite the concept of microstates is straight-forward and offers various quantifications of the EEG signal with a relatively clear neurophysiological interpretation, a few important aspects about the currently applied methods are not readily comprehensible. Here we aim to increase the transparency about the methods to facilitate widespread application and reproducibility of EEG microstate analysis by introducing a new EEGlab toolbox for Matlab. EEGlab and the Microstate toolbox are open source, allowing the user to keep track of all details in every analysis step. The toolbox is specifically designed to facilitate the development of new methods. While the toolbox can be controlled with a graphical user interface (GUI), making it easier for newcomers to take their first steps in exploring the possibilities of microstate analysis, the Matlab framework allows advanced users to create scripts to automatise analysis for multiple subjects to avoid tediously repeating steps for every subject. This manuscript provides an overview of the most commonly applied microstate methods as well as a tutorial consisting of a comprehensive walk-through of the analysis of a small, publicly available dataset

Sinonimia, polisemia y homonimia en lengua árabe

El articulo trata o soluciona los fenómenos como la sinonimia, polisemia y homonimia en las lenguas (aquí en la lengua española y árabe), según la teoría del “esquema básico de la referencia”, una teoría desarrollada del legado árabe y la teoría cognitiva, que salió en el año 1987 en América, por eso hemos usado la terminología de la gramática cognitiva. Esta teoría va a ser en el futuro la base de una lingüística moderna holística muy diferente de la lingüística tradicional que podemos ver o averiguar en las referencias americana mencionadas en el artículo.Deals with synonymy, polysemy and homonimy in Spanish and Arabic as grounded in the theory of the basic scheme of reference handed down by Arab legacy and the cognitive theory published in the USA in 1987. It is used the jargon for cognitive grammar to present the arguments, but in the future this theory will only be the basis for a holistic modern linguistics very different from the traditional USA linguistic theories referred to in the paper