Abstract: “There exist several accessibility evaluation tools for websites. However, no formal framework is available to evaluate the performance of assistive tools that are used by blind users to use internet. In this paper, we present a hierarchical model for quantitative evaluation of assistive tools for blinds. Identifying various performance attributes and Design metrics, we establish relationship among these to obtain the overall performance Index of the assistive tools. It is hoped that researchers and the others concerned shall find the work relevant for further discussion and formalization in this direction.”

Keywords: attributes, Speech based Browsers, Accessibility, Usability,