Evaluating the usability of CAPTCHAs on a mobile device with voice and touch input

Wismer, Andrew; Madathil, Kapil Chalil; Koikkara, Reshmi; Juang, Kevin A.; Greenstein, Joel S.

doi:10.1177/1071181312561217

Cited by 12 publications

(6 citation statements)

References 9 publications

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“…Our quantitative results are comparable to other usability studies employing the CSUQ, in that total ratings were above average [ 36 , 37 ]. When comparing survey items rated most to least favorably with focus group comments, there were instances when survey ratings and quotes were discordant and concordant.…”

Section: Discussionsupporting

confidence: 84%

The Usability of Diabetes MAP: A Web-delivered Intervention for Improving Medication Adherence

Nelson

Bethune²,

Lagotte³

et al. 2016

JMIR Human Factors

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BackgroundWeb-delivered interventions are a feasible approach to health promotion. However, if a website is poorly designed, difficult to navigate, and has technical bugs, it will not be used as intended. Usability testing prior to evaluating a website’s benefits can identify barriers to user engagement and maximize future use.ObjectiveWe developed a Web-delivered intervention called Diabetes Medication Adherence Promotion (Diabetes MAP) and used a mixed-methods approach to test its usability prior to evaluating its efficacy on medication adherence and glycemic control in a randomized controlled trial.MethodsWe recruited English-speaking adults with type 2 diabetes mellitus (T2DM) from an academic medical center who were prescribed diabetes medications. A trained research assistant administered a baseline survey, collected medical record information, and instructed participants on how to access Diabetes MAP. Participants were asked to use the site independently for 2 weeks and to provide survey and/or focus group feedback on their experience. We analyzed survey data descriptively and qualitative data thematically to identify participants’ favorable and unfavorable experiences, characterize usability concerns, and solicit recommendations for improving Diabetes MAP.ResultsEnrolled participants (N=32) were an average of 51.7 ± 11.8 years old, 66% (21/32) female, 60% (19/32) non-Hispanic White, 88% (28/32) had more than 12 years of education, half had household incomes over $50,000, and 78% (25/32) were privately insured. Average duration of diagnosed diabetes was 7.8 ± 6.3 years, average A1c was 7.4 ± 2.0, and 38% (12/32) were prescribed insulin. Of enrolled participants, 91% (29/32) provided survey and/or focus group feedback about Diabetes MAP. On the survey, participants agreed website information was clear and easy to understand, but in focus groups they reported navigational challenges and difficulty overcoming user errors (eg, entering data in an unspecified format). Participants also reported difficulty accessing the site and, once accessed, using all of its features. Participants recommended improving the site’s user interface to facilitate quick, efficient access to all features and content.ConclusionsAdults with T2DM rated the Diabetes MAP website favorably on surveys, but focus groups gave more in-depth feedback on the user experience (eg, difficulty accessing the site, maximizing all of the site’s features and content, and recovering from errors). Appropriate usability testing methods ensure Web-delivered interventions work as intended and any benefits are not diminished by usability challenges.

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Section: Discussionsupporting

confidence: 84%

The Usability of Diabetes MAP: A Web-delivered Intervention for Improving Medication Adherence

Nelson

Bethune²,

Lagotte³

et al. 2016

JMIR Human Factors

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“…To be usable for mobile devices, the proposed solution leveraged unique features like touchscreen of mobile gadgets to provide a user‐friendly and efficient CAPTCHA. Also, usability of mobile CAPTCHAs with voice and touch input was evaluated in . As an important outcome of this study, it has been shown that users prefer the CAPTCHAs involving touch input on mobile devices.…”

Section: Captcha Variationsmentioning

confidence: 97%

CAPTCHA and its Alternatives: A Review

Moradi

Keyvanpour

2014

Security Comm Networks

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Nowadays, because of the undeniable impact of the Internet on all aspects of human life, security preserving has received more attention. To reach an acceptable level of security, Completely Automatic Public Turing test to tell Computer and Human Apart or simply CAPTCHA as a security preserving tool has been tailored for situations that need to prevent bots from doing a specific action; for example, signing up and downloading. Simultaneously, it should be also designed in such a way to allow humans to perform the same action. Despite its advantageous applications, there are several important issues such as security, usability, and accessibility that make its use controversial. In this paper, attempts were made to do a comprehensive review on various aspects and state-of-the-art of CAPTCHA in general and its alternatives in particular to help researchers easily focus on specific issues for the sake of proposing new solutions and ideas. Regarding the advancement in CAPTCHA development, new classifications were proposed to categorize different variations of CAPTCHAs and their problems and then compare them. Moreover, different types of CAPTCHAs' alternatives were classified and evaluated by introducing several proposed measures. This evaluation could come in handy for future studies that aim to develop new techniques for overcoming current deficiencies.

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“…While the majority of usability analysis has been done for captchas on desktops, attention to evaluations of captchas for mobile device usage has been limited. Wismer et al [16] explore voice and touch input of existing captchas on mobile devices. Their evaluation focuses on voice and touch input using Apple's iPad and they found significant problems.…”

Section: Related Workmentioning

confidence: 99%

Exploring the Usability of CAPTCHAS on Smartphones: Comparisons and Recommendations

Reynaga¹,

Chiasson²,

Oorschot³

2015

Proceedings 2015 Workshop on Usable Security

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Completely Automated Public Turing tests to tell Computers and Humans Apart (captchas) are challenge-response tests used as a security mechanism on the web to distinguish human users from automated programs. While captchas are often necessary to stop abuse of resources, most existing schemes are intended for traditional desktop computing environments rather than for mobile device usage. In this paper we present a comparative user study of nine captcha schemes on smartphones to assess whether alternative input mechanisms help improve the usability of captchas in smartphones, and to evaluate the usability of modified schemes intended to be more suitable for smartphones. The results show that although participants find virtual keyboards on smartphones prone to errors they prefer them as input mechanism over other alternatives. We also found that the content of the challenge is highly relevant in users' perceptions when it comes to captchas on smartphones. Based on our experiences, we offer a set of ten specific recommendations for the implementation of captchas on smartphones. Permission to freely reproduce all or part of this paper for noncommercial purposes is granted provided that copies bear this notice and the full citation on the first page. Reproduction for commercial purposes is strictly prohibited without the prior written consent of the Internet Society, the first-named author (for reproduction of an entire paper only), and the author's employer if the paper was prepared within the scope of employment.

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Evaluating the usability of CAPTCHAs on a mobile device with voice and touch input

Cited by 12 publications

References 9 publications

The Usability of Diabetes MAP: A Web-delivered Intervention for Improving Medication Adherence

The Usability of Diabetes MAP: A Web-delivered Intervention for Improving Medication Adherence

CAPTCHA and its Alternatives: A Review

Exploring the Usability of CAPTCHAS on Smartphones: Comparisons and Recommendations

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