theme image
Easy does it: more usable captchasEasy does it: more usable captchas
  1. publications
  2. user experience

Easy does it: more usable captchas

Available Media

Publication (Pdf)

ConferenceConference on Human Factors in Computing Systems (CHI) - 2014
AuthorsElie Bursztein , Angelika Moscicki , Celine Fabry ,
Citation

Bibtex Citation

@inproceedings{ BURSZTEIN2014EASY,title = {Easy does it: more usable captchas},author = {"Elie, Bursztein" and "Angelika, Moscicki" and "Celine, Fabry" and "Steven, Bethard" and "John C., Mitchell" and "Dan, Jurafsky"},booktitle = {Conference on Human Factors in Computing Systems},year = {2014},organization = {ACM}}

Websites present users with puzzles called CAPTCHAs to curb abuse caused by computer algorithms masquerading as people. While CAPTCHAs are generally effective at stopping abuse, they might impair website usability if they are not properly designed. In this paper we describe how we designed two new CAPTCHA schemes for Google that focus on maximizing usability. We began by running an evaluation on Amazon Mechanical Turk with over 27,000 respondents to test the us- ability of different feature combinations. Then we studied user preferences using Googles consumer survey infrastructure. Finally, drawing on the insights gleaned during those studies, we tested our new captcha schemes first on Mechanical Turk and then on a fraction of production traffic. The resulting scheme is now an integral part of our production system and is served to millions of users. Our scheme achieved a 95.3% human accuracy, a 6.7% improvement.

Recent

newsletter signup slide

Get cutting edge research directly in your inbox.

newsletter signup slide

Get cutting edge research directly in your inbox.