I am a Assistant Professor at Clemson University with Joint appointments in the Department of Civil Engineering and Department of Industrial Engineering. I also direct the technology operations of the Clemson University Center for Workforce Development.I received my PhD in Industrial Engineering (Human Factors) from Clemson University in December 2013. My research covers the entire spectrum of system design: from identifying the user needs to designing and developing interfaces that inform and motivate user behavior and empirically evaluating the efficacy of these interventions. My recently completed dissertation explored how anecdotal information influences a healthcare consumer’s decision-making process, including the development and empirical evaluation of interface designs to support the decision making process when inaccurate anecdotal information is provided to the consumers. My earlier work focused on developing and evaluating interfaces for computer security. I have also developed virtual reality-based interfaces to support engineering education and remote usability testing. My work has been published in several scientific peer-reviewed publications in many top venues including ACM CHI, HFES and Joint Summits on Translational Science garnering three best paper nominations (CHI’12, HFES’13, Clinical Research Informatics’13). Please see my publications page for more details.
You may access my research portfolio here.
Interfaces to Support Healthcare Decision Making
This research investigates how consumers’ narrative accounts can be integrated into the quality reporting process by presenting anecdotal information in ways that complement the quantitative quality information provided by Federal entities. This research first investigates how a health consumer’s choice of care is influenced by anecdotal information on the care process available on YouTube, followed by the development of information presentation methods to support the consumer’s ability to make an informed decision.
Mobile Interfaces for Capturing Research Permissions
An open source tool to capture and manage, in a computable format, patient consents for research and treatment. This system called Research Permissions Management System (RPMS) allows patients to review and update their consent status via a patient portal, and makes consent data available to researchers via i2b2 queries. RPMS is under development, and elements will be released as they are completed.
Image-based CAPTCHAs and Usability
Understanding the human interaction pattern with image-based CAPTCHAs. Specifically, this research investigates the usability of image-based CAPTCHAs on mobile devices using performance, eye-gaze and subjective measures. We are now investigating the effects of voice-based interactions with image-based CAPTCHAs.
Remote Usability Testing Methods
This study proposes a new methodology for conducting synchronous remote usability studies using a three-dimensional virtual usability testing laboratory and then compared it with the traditional lab approach and WebEx. The results of this study suggest that participants were productive and enjoyed the virtual lab condition, indicating the potential of a virtual world based approach as an alternative to the conventional approaches for synchronous usability testing.
Information Visualization on Mobile Devices
The development of smaller handheld mobile phones has created new challenges in the field of human-computer interaction, especially in the design of mobile visual interfaces. Line graphs and pie charts with 5,10,15 and 20 data points were developed and displayed on a mock iPhone® interface.The results suggest that having charts and graphs with more than 15 data points has a negative impact on the usability and performance degraded as the number of data points increased.
Virtual Reality-based Simulators
The aircraft maintenance system is technologically complex, consisting of integrated human and machine components. To address this need, simulation and visualization tools were developed focusing on two important cognitive components — visual search and decision making. Transfer effect studies were conducted to evaluate the efficacy of the virtual reality-based environment. The results suggest that VR-based simulator involvement is advantageous and beneficial in improving learning outcomes.