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Internet Technol."],"published-print":{"date-parts":[[2017,2,28]]},"abstract":"<jats:p>Laughter is a social signal capable of facilitating interaction in groups of people: it communicates interest, helps to improve creativity, and facilitates sociability. This article focuses on: endowing virtual characters with computational models of laughter synthesis, based on an expressivity-copying paradigm; evaluating how the physically co-presence of the laughing character impacts on the user\u2019s perception of an audio stimulus and mood. We adopt music as a means to stimulate laughter. Results show that the character presence influences the user\u2019s perception of music and mood. 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