“…In this order, one category of the research works reported in this study is devoted to the definition of new data sources for LA (see Table 7). These works explore the use of human-generated data like grades (Villamañe, Alvarez, & Larrañaga, 2020) or information provided by teachers in the learning design (Rodríguez-Triana, Martínez-Monés, Asensio-Pérez, & Dimitriadis, 2015); biometric signals captured with sensors (de Arriba-Pérez, Caeiro-Rodríguez, & Santos-Gago, 2018); or multimodal data including both self-reported and sensor-based data (Vujovic & Hernández-Leo, 2019). Some of these works are exploratory, and are aimed at identifying indicators for learning based on new data sources or at defining better learner models.…”