This chapter starts by depicting how the topic of web accessibility metrics was in 2011, analyses what has happened since, and discusses the challenges that accessibility metrics face today. More specifically, we review a variety of metrics and a quality framework for metrics based on validity, reliability, sensitivity, adequacy and complexity. We then describe what new metrics were defined and how metrics have been used in the last 7 years, which range from assessments of accessibility awareness, of accessibility progress, to in-depth analyses within the banking sector, in country-based and continent-based assessments. We illustrate metrics that use new kinds of data, like human judgements or questionnaires, that in some case are used to deal with validity and reliability of metrics. The chapter ends with a discussion of the challenges ahead.
Automatic Web Accessibility Metrics: Where We Were and Where We Went
Brajnik G.;
2019-01-01
Abstract
This chapter starts by depicting how the topic of web accessibility metrics was in 2011, analyses what has happened since, and discusses the challenges that accessibility metrics face today. More specifically, we review a variety of metrics and a quality framework for metrics based on validity, reliability, sensitivity, adequacy and complexity. We then describe what new metrics were defined and how metrics have been used in the last 7 years, which range from assessments of accessibility awareness, of accessibility progress, to in-depth analyses within the banking sector, in country-based and continent-based assessments. We illustrate metrics that use new kinds of data, like human judgements or questionnaires, that in some case are used to deal with validity and reliability of metrics. The chapter ends with a discussion of the challenges ahead.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
