Evaluating Existing Audio CAPTCHAs and an Interface Optimized for Non-Visual Use
Jeffrey P. Bigham, Anna C. Cavender · 2009 · Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI 2009)
This paper presents the first large-scale evaluation of audio CAPTCHAs — the purportedly accessible alternative to visual CAPTCHAs — revealing that they are dramatically more difficult for both blind and sighted users. The study gathered 10 types of audio CAPTCHAs from major…
blind and low vision · web accessibility · screen readers · CAPTCHA · authentication