Screen-Reader Usability at a Standards-Compliant E-Commerce Site
http://joeclark.org/access/research/E-commerce-plus-screenreader//Screen-Reader-Usability.html

Clark, Joe
JoeClark.org
2005

Abstract:

An E-commerce site was redesigned with Web standards in mind. The revised site used semantic HTML markup that usually passes validation tests and also incorporated many common accessibility features. A study was carried out with screen-reader users to determine how well compliance with Web standards and accessibility guidelines translated into actual usability and accessibility.