# Haptic Glove TV Device for People with Visual Impairment
## 6 Analysis and Evaluation of Results
### Methodology and Evaluation Parameters  
For the analysis of the results, evaluation tests were carried out with the glove and the sample video on a group of 15 blind people: 12 men and 3 women, aged between 16 and 67. Users used the device for at least 30 min. Most did not use the glove for the 90 min of a  
Figure 13: Conformation of the Transport Stream with Metadata. soccer match because of their time availability. Explaining its operation and performing a previous stage of training took time and the time spent filling in the survey. The evaluation was not done for more than 30 min, so that the experience would not become too tired or dull and lose objectivity. In order to compile and tabulate the results obtained in an orderly and precise way, surveys of questions were carried out, generally closed questions, where they had to choose from 1 to 5 according to the Likert scale [54], where 1 is very low, 2 low, 3 medium, 4 high and 5 very high. The survey was separated into two parts. The first part was carried out before using the glove. It consisted of collecting general information from the user and finding an initial perception of the prototype by the people who were going to use the glove. The results in this first stage showed the respondents' level of visual disability, which was very high, as shown in Figure 14.  
Of the fifteen people surveyed, twelve participants had lost their sight for various reasons, such as accidents or illness, and three participants were born blind. It was a bit more complicated with these three participants to perform the tests because they had never seen a soccer field, although they were curious and expected to try the glove. Of the 15 respondents, 14 declared themselves to be right-handed and one ambidextrous, so they were optimal for the test, as the glove design was made for the right hand. The 15 respondents also stated that they had no previous experience with a technological device that allowed them to experience TV in an immersive way, which caused great expectations. In terms of statistical analysis, two different ways are used. In the first one, the questions are analyzed individually on an ordinal Likert scale using descriptive statistics. To summarize the data numerically and visually, parameters such as mean, median, mode, standard deviation, symmetry, and kurtosis are used. In some questions, a bar graph is also shown to visualize the frequency of each item choice. The second way of analyzing the data uses other statistical tools such as bootstrap re-sampling and non-parametric statistical methods to obtain global results with confidence parameters. The non-parametric method used was the [PERSON]'s medians test, based on a particular case of the [PERSON]'s chi-square test. While in the case of Bootstrap, it is still a parametric test that focused on the analysis of means and uses the t-tests to calculate confidence intervals. Tables 3-5 summarize the results of the application of these methodologies. Figure 14: Percentage of visually impaired respondents. However, the most important questions were asked in this stage to know if a need exists and that the glove could provide a solution. Were the questions that are detailed in the Figures 17-21. From here on, the tabulated questions will be shown in the form of a histogram. Statistical values such as mean, median, mode, standard deviation, kurtosis value, and skewness will also be shown to better interpret the results obtained in the evaluation of the glove. Kurtosis is a statistical measure that determines the degree of concentration of a variable's values around the central area of the frequency distribution. This will be positive and higher if there is a large concentration of values around its average. Skewness is a measure of symmetry, or more precisely, the lack of symmetry. A distribution, or data set, is symmetric if it looks the same to the left and right of the center point. As the data becomes more symmetrical, the value of its skewness approaches zero. Data with positive skewness