# Personalizing Environmental Awareness through Smartphones Using AHP and PROMETHE II
## 5 Evaluation
### Data Analysis and Discussion  
The results evaluating the usefulness of the developed mobile application in relation to the awakening of environmental consciousness, presented in Figure 2, showed students perceived the application to be interesting, enjoyable, easy to use, accessible, and insightful. In particular, a total of 67% strongly agreed that the application was easy to use, while 78% of the participants found its interface pleasant. When students were asked about the personalized advice provided, the majority of them (49.2% + 30.8% = 80%) agreed that the advice was highly related to the place they were in at the time they displayed, and a corresponding remarkable percentage (47.5% + 36.7% = 84.2%) agreed that the advice was compatible with their interests and needs. These results support the effectiveness of the model used for selecting the most suitable advice regarding the use profile and the overall context. Moreover, 52.5% of the participants strongly felt that the advice was very useful, while 34.2% agreed to this statement. It should also be noted that 50.8% of the students strongly enjoyed the application's advice, while 40.8% agreed with this statement. Concerning the system's operations, a very high percentage of the participants (54.2% + 28.3% = 82.5%) agreed that \begin{table}
\begin{tabular}{c c c} \hline \hline \multicolumn{2}{c}{**Demographic Characteristics**} & \multicolumn{2}{c}{**Number of Students (\%)**} \\ \hline Gender & Male & 68 (56.67) \\  & Female & 52 (43.33) \\ \hline Age & 20–24 & 74 (61.67) \\  & 25–29 & 16 (13.33) \\  & 30–34 & 18 (15) \\  & \(\geq\)35 & 12 (10) \\ \hline Education Level & Undergraduate & 70 (58.33) \\  & Postgraduate & 50 (41.67) \\ \hline Mobile IT Devices & Smartphone & 120 (100) \\  & Tablet & 78 (65) \\ \hline \hline \end{tabular}
\end{table} 
Table 5: The distribution of participants in the survey regarding demographic characteristics. the application provided all the functions and capabilities they expected. Furthermore, a total of 83.3% agreed that they intended to use the application in the future, while 13.3% chose to be neutral and 3.4% disagreed with this statement. Similarly, an extremely large group of 89.2% stated that they would recommend this application to a friend, while 9.2% declared neutrality and only 1.7% disagreed with this statement. These findings reflect the user acceptance of the developed application and the positive impact after using the developed mobile application. Tables 6-8 illustrate the frequency distribution of the answers in questions relating to the three environmental dimensions evaluated, namely the conscious consuming, the reduction of waste and recycling, and the energy saving, respectively. They also present the pre-test/post-test results comparing the environmental awareness which emerged from each question of each dimension. Regarding conscious consuming (Table 5), before the use of the application, the participants rarely or never printed the document on both sides of the paper (35.83% + 17.50% = 53.33%), while after using the application it is observed that the majority tended to print on both sides of the paper (25.83% + 28.33% = 54.16%). Moreover, the application fostered participants' preference to send e-mail instead of using hard copy output, since the percentage of \"sometimes\" option reduced by half (31.67% before using the application, 15.83% after using the application) and the percentages of \"every time\" and \"often\" were almost doubled (from 20.83% and 20.00% to 41.67% and 38.33%, respectively). It also seems they stopped printing documents and preferred to read them online, as the answer \"every time\" was quadrupled and the option \"often\" was doubled for this statement, while the percentages of options \"never\" and \"rarely\" were significantly decreased.