“…Given the high relevance of parameter optimization and usability evaluation, naturally, further user studies are one of our main interests for future work -for example, comparative evaluations with our previous work [3,4] and tests in true mobile scenarios, where people use the interface designs in an actual mobile situation, (e.g., while riding the bus or when walking), as already mentioned in Section 2 and 4, respectively. In the experiments presented here, participants had to solve different problems that represent typical browsing task, i.e.…”