# Haptic Glove TV Device for People with Visual Impairment
## 6 Analysis and Evaluation of Results
### Usability and User Experience Results  
The second part of the survey was conducted when the glove users completed the tests, i.e., they used the haptic glove while listening to a soccer match. The questions were divided into three stages: the usability and user experience, the ergonomics and construction of the glove, and the requirements for future use and improvements to the device. About the usability and user experience, Table 3 shows the 12 questions of this topic, with their respective statistical results. Figure 22 shows the statistical analysis of originally observed samples graphically. Hereafter, in order to have a complete analysis of the data and overcome the limited number of samples obtained with the 15 blind people, we used a means Bootstrap resamples with a bilateral confidence interval of 95% and 1000 samples. We also used [PERSON]'s median test as a second method. This technique tests the null hypothesis that the medians of populations from which two or more samples are drawn are identical also with a bilateral confidence interval of 95%. The data from each sample are assigned to two groups, one consisting of data whose values are above the two groups' median, and the other consists of data whose values are at or below the median. A [PERSON]'s chi-square test is then used to determine whether the observed frequencies in each sample differ from the expected frequencies derived from a distribution combining the two groups. In this first stage, the first question is the most important, as it validates that the glove's objective was met, since a large percentage of people evaluated the glove positively and were able to locate the position of the soccer ball within the field. Even though this was the first time they used the glove and were not familiar with it, the results were positive, as seen in Figure 23. The average, median, and mode are in high values; 10 of the 15 respondents gave a high and very high rating, four people gave an average rating, and only one person gave a low rating. This person was the only one who felt burdened. The participant had been blind since birth and found it difficult to understand the methodology. In fact, he felt stressed by the glove. The following three questions validated in more detail which position was more comfortable for the users to recognize on the soccer field. Figure 22: Usability and user experience evaluation results. Figure 22, question 2, shows where they had the greatest ease in identifying the location of the ball, which was on the \(X\) axis, i.e., along the court. Question 3 shows where they had the greatest difficulty, which was identifying the ball in the \(Y\) axis, that is, along the width of the soccer field. This is because it was necessary to have an excellent perception and to be able to identify the three levels of vibration intensity. It is possible that this can be improved with training and more use of the haptic glove or by modifying the notification procedure for this parameter. Question 4 shows that the mean is also high concerning the location of the ball in the \(Z\) axis, that is, the height of the ball above the ground. It is lower than the difficulty involved in identifying the ball on the \(X\) axis, it is possible because some of them focused on identifying the \(XY\) plane, that is, the length and width of the soccer field, and the information on the height of the ball was not very relevant. Although it was useful to know this information for most, they were able to identify it easily. About the level of intensity of the vibrations generated by the glove as shown in Figure 22, question 5, most think they are adequate. However, a small number of participants are likely more sensitive to touch, thinking that it could be modified to feel better with the glove. Figure 22, question 6, shows that most participants perceive that there is an adequate synchronization between the narrative of the match and the location of the ball that they identified with the glove.