# Service-Aware Interactive Presentation of Items for Decision-Making
## Materials and Methods
### Review Analysis
#### 3.2.3 Binding Review Sentences to Evaluation Dimensions
Regarding the education level, 39.47% attended the high school, 44.74% university, 13.16% have a Ph.D, and 2.63% attended middle school. Regarding familiarity with technology, 39.47% of participants qualified themselves as experts in using technology, 42.11% as intermediate, and 18.42% as beginners. Moreover, 47.37% of people declared that they use e-commerce platforms or online booking services monthly, 28.95% about twice a year, 15.79% weekly, and 7.89% daily. ### User Experience: Post-Task Questionnaire Results

Figure 5 shows the evaluation results concerning user experience with Baseline and the INTEREST model underlying Apartment Monitoring. The figure provides detailed results for each item of the post-task questionnaire. As these aspects are measured in the \([-3,3]\) scale, we consider as positive the values \(\geq\)0.8 and negative those lower than \(-0.8\); the other ones are neutral. * The Baseline model received some positive values related to the following factors. Perspicuity (easy to learn/easy), Dependability (secure), and Awareness and control (awareness of the

Figure 5: Post-task questionnaire results with items sorted as in the administered survey. The histogram shows the comparison of Baseline and INTEREST models on individual UX aspects. The colors of each bar represents the UX factor to which the bipolar item belongs, see Table 3 for color mappings. properties of the home). However, it definitely has negative values concerning Novelty (dull, conventional, usual, conservative) and Stimulation (boring, not interesting, motivating). Furthermore, it has moderately negative values of Efficiency (slow, impractical, cluttered) and Attractiveness (unattractive); the other user awareness aspects are neutral. Table 15 in the Appendix A shows detailed numeric values. * INTEREST, in its Apartment Monitoring implementation, received positive values in all UX aspects, with a slightly weaker evaluation of Dependability (predictable) with respect to the other values, see Table 16 in the Appendix A for details. Notice that, even in the cases in which Baseline received a neutral or positive evaluation, the difference between its value and the one obtained by INTEREST is large and our model achieves the best results. Table 5 shows the aggregated values obtained by averaging participants' answers by UX factor (Attractiveness, etc.). These results are particularly interesting because they describe the overall perception of ergonomic and hedonic qualities, attractiveness, and awareness and control, which are the main UX evaluation factors we consider. In the table, colored arrows help data interpretation: \(\rightarrow\) denotes a neutral value, \(\downarrow\) a negative one, and \(\uparrow\) a positive one. We compared these results by means of a paired \(T\)-Test and the differences are significant (\(p<0.01\)). From these results, it can be seen that Baseline was unsatisfactory as far as Efficiency, Stimulation, and Novelty are concerned, while it received neutral evaluations in the other factors. Differently, INTEREST obtained positive values in all UX factors, showing its superiority. Specifically, our model excelled in participants' perception of its Efficiency, Perspicuity, and Awareness and control, all of which got values very near to 2 o higher than that. The lowest value concerns Stimulation, which is well above 1.6, i.e., positive. In order to provide a more analytic view of participants' experience with the two systems we converted the UX results presented in Table 5 to the [0, 100] scale and we computed the relative difference between the obtained values. The third column of Table 6 shows these differences. It can be seen that INTEREST obtained dramatically higher results in what concerns Attractiveness, Efficiency, Stimulation, and Novelty, where it outperformed Baseline by more than 100%. Moreover, it outperformed Baseline in Perspicuity, Dependability, and Awareness and control by approximately 40-45%.