Test d'usuaris amb baixa visió en gràfics estadístics

Abstract

[en] Nowadays, statistical charts are a resource widely used in day-to-day data representation, this resource improves the understanding of a large volume of data in a very efficient way, but it is not usually visually accessible for the whole population. In this respect, much research has been carried out on accessibility for the blind and visually impaired, but for the low vision group, although accessibility proposals for the blind and visually impaired also have benefits for them, there is a significant lack of research studies on accessibility for this group. This project aims to evaluate statistical charts created with good accessibility practices, comparing them with charts developed with one of the most popular tools for creating statistical charts, the Microsoft Excel application. The aim is to evaluate, with low vision users, the practices collected in previous research with heuristic evaluation techniques. For this purpose, a methodology has been followed for the creation of the tasks to be carried out, the recruitment and the execution of the tests by the users. The test was carried out with 9 users of the low vision and colour vision deficient group. This test consisted of carrying out a series of tasks on different statistical charts, the bar chart, the stacked bar chart and the line chart, with the two versions, the one created with default Microsoft Excel options and the one created by applying good accessibility practices with the Highcharts JavaScript library. The results conclude that following the heuristics provides a better experience for users with low vision and colour vision deficient group.