New ways to interact with technology are gaining ground over the familiar Graphical User Interfaces (GUI). The Tangible User Interfaces (TUI) are one example of this. However, while it may seem intuitive that such interfaces should evoke rather positive responses from users - e.g. feelings associated with pleasure - little has been studied in this sense. In this challenge of understanding the feelings that GUI and TUI have the potential to evoke, we present our findings from a research that involved more than a hundred people. The research question that guided our endeavors was: What are the relations between the feelings of joy, motivation and comfort when using TUI and GUI? We analyze the results and discuss some hypotheses to explain the behavior observed.
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