## 4 Results
### Effectiveness
#### 4.2.3 Post-Questionnaire  
After the usability testing session, the moderator asked the participants to fill out the post-session questionnaire to measure the user's satisfaction and suggestions for the three systems. Regarding the Noor system, only three participants filled the form because, as we mentioned before, one of the participants could not perform the tasks due to the unforeseen downtime of the Noor system. The participants were asked to rate the three systems based on seven statements and using a five-point Likert scale (totally disagree to totally agree).  
Two participants said that they wanted to use the three systems again; however, the other two participants stated that they did not want to use the iEN system.  
One of the participants stated that she did not face any problem with the screen readers when using the Noor and Faris systems, and it is worth mentioning that this participant was partially blind. The rest of the participants stated that they had problems, while one of them was neutral, i.e., she did not have an opinion.  
As for the ease of use, the answers varied; half of the participants stated that they found the systems easy to use or they were neutral about that, while the other half found the systems difficult to use.  
Most of the participants said that they totally agreed that they needed someone to help them to use the three systems, while few of the participants had a neutral feeling about that for the Noor and Faris systems. Moreover, one participant did not agree that she needed someone to help her to use the iEN system.  
Furthermore, when we asked the participants if they thought they would learn to use the three systems quickly, the answers ranged between \"totally agree\" and \"neutral\" regarding the Noor and Faris systems. However, all participants answered \"totally disagree\" and \"disagree\" regarding the iEN system. About half of the participants stated that they felt confident while using the systems; however,  
Figure 10: Play interactive content task.  
three of them did not feel confident regarding the iEN system. All participants agreed that they needed to learn a lot of things before they could get going with the systems.  
As for the open-ended questions, when we asked about what they liked least about the systems, all participants said that they did not like how the systems did not support screen readers. As for the things they liked, one participant said she liked the easy login process in the Noor and Faris systems. Others said that she liked to use the two systems to \"be independent and maintain the privacy of my information.\" However, no participants liked anything regarding the iEN system.  
The participants stated three reasons that would make them use the systems again, which were: maintaining privacy, training, and independence.  
Finally, all participants emphasized the importance of achieving high levels of accessibility in the three systems and considering designing the systems for screen readers' compatibility. Another important issue that was identified by participants was to provide suitable training for VI teachers to help them use the systems with the same level of independence and privacy as anyone else.