1 Augmented Reality Augmented reality is an emerging technology that allows the real, physical world to be enhanced/reinforced by virtual information. The potential user has real time control of the physical object/context on which audiovisual, virtual scenes - generated by a hardware - are imposed (Kato & Billinghurst, 1999; Lee, 2012). To avoid ambiguity, it is important to distinguish between Augmented and Virtual Reality (VR), since these two terms are often mixed up. Virtual Reality (VR) refers to the process of immersing yourself into a virtual environment that is a computer-generated simulation of an alternate world. Through the appropriate equipment (e.g., headsets and gloves), the user is “losing contact” from the real world and is immersed in an artificial environment. In contrast, in Augmented reality (AR) the information of the real world, perceived by the individuals through their senses, is enriched with digital data such as audiovisual, sensory elements. Since AR doesn’t try to recreate a completely virtual world, the requirements are simple: you need a smartphone or tablet to run augmented reality applications. For this reason, it is affordable and accessible technology that can become easily available to be used in many ways. The real world (such as surfaces, faces, hands) is captured through a smartphone camera and trackability features. Then, the AR app overlays virtual objects, so that users can see them on their smartphone screen, having the illusion that the digital object is actually there. The augmentation of the real world is used to increase the degree of interactivity. Thus, AR is incorporated into various sectors: business, retail, advertising, entertainment, education, and training. Practitioners in the field of education and training can take advantage of the many benefits of AR (Hennel, Schmidt-Kraepelin, Van den Eynden, and Basten, 2015; Quintero, Baldiris, Rubira, Cerón, and Velez, 2019): - Enhancement of users’ interaction with technology and content - Meaningful construction of knowledge through experience and trial and error - Various ways of knowledge representation - Increase and sustenance of motivation and overall satisfaction - Improvement of concentration - Opportunities for collaboration and reflection
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