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Praharaj, Sambit (author), Scheffel, Maren (author), Drachsler, Hendrik (author), Specht, M.M. (author)Collaboration is one of the important 21st-century skills. It can take place in remote or co-located settings. Co-located collaboration (CC) is a very complex process that involves subtle human interactions that can be described with indicators like eye gaze, speaking time, pitch, and social skills from different modalities. With the advent...review 2021