Dataset of automatic web accessibility evaluation of English-language massive open online courses in adult basic life support

The data shows results of automatic web accessibility evaluation of English-language massive open online courses in adult basic life support. For the evaluation the WAVE web accessibility evaluation tool (WebAIM, Utah State University, USA) was utilised. WAVE is a free online service that automatically identifies accessibility violations in a web page content and highlights them in browser interface with embedded icons and indicators. For every eligible course all accessibility errors (indicating failures to meet certain Web Content Accessibility Guidelines (WCAG) 2.1 success criteria that should impact users with disabilities) and all accessibility alerts (indicating web content elements that may cause accessibility issues) were collected. The data shows numbers of detected errors and alerts.