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Browsing by Subject "User study"

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    • Conference Object  

      CogniMouse: On detecting users' task completion difficulty through computer mouse interaction 

      Belk, Marios; Portugal, D.; Christodoulou, Eleni; Samaras, George S. (Association for Computing Machinery, 2015)
      This paper presents a method for analyzing users' computer mouse interaction data with the aim to implicitly identify task completion difficulty while interacting with a system. Computer mouse motion streams and users' ...

    • Article  

      Data-driven user profiling to support web adaptation through cognitive styles and navigation behavior 

      Germanakos, Panagiotis; Papatheocharous, Efi; Belk, Marios; Samaras, George S. (2012)
      This paper aims to analyze human navigation behavior and identify similarities of cognitive styles using measures obtained from psychometric tests. Specific navigation metrics are utilized to find identifiable groups of ...

    • Article  

      Do human cognitive differences in information processing affect preference and performance of CAPTCHA? 

      Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2015)
      A Completely Automated Public Turing test to tell Computers and Humans Apart (CAPTCHA) is a widely used security defense mechanism that is utilized by service providers to determine whether the entity interacting with their ...

    • Article  

      Exploring the potential of user modeling based on mind maps 

      Beel, J.; Langer, S.; Kapitsaki, Georgia M.; Breitinger, C.; Gipp, B. (2015)
      Mind maps have not received much attention in the user modeling and recommender system community, although mind maps contain rich information that could be valuable for user-modeling and recommender systems. In this paper, ...

    • Conference Object  

      g-Social: Enhancing integrated e-Science tools with social networking functionality 

      Stylianou, A.; Loulloudes, Nicholas; Dikaiakos, Marios D. (2012)
      During the last decade, the scientific community has witnessed an unprecedented deployment of large-scale, federated e-Infrastructures such as Grid Computing, primarily for supporting data-intensive scientific exploration ...

    • Article  

      A human cognitive processing perspective in designing E-Commerce checkout processes 

      Belk, Marios; Germanakos, Panagiotis; Constantinides, Anthony G.; Samaras, George S. (2015)
      Designing a usable checkout process is of paramount importance for both E-Commerce and M-Commerce success. Aiming to understand human-computer interactions during checkout and improve the usability and user experience of ...

    • Article  

      An individual differences approach in adaptive waving of user checkout process in retail eCommerce 

      Belk, M.; Germanakos, P.; Asimakopoulos, S.; Andreou, P.; Mourlas, C.; Spanoudis, George C.; Samaras, G. (2014)
      Developing a usable checkout process is pivotal for e-business success. However, recent research has shown that users frequently abandon their shopping carts and lacking a clear direction through the process. In this ...

    • Article  

      The interplay between humans, technology and user authentication: A cognitive processing perspective 

      Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2017)
      This paper investigates the interplay among human cognitive processing differences (field dependence vs. field independence), alternative interaction device types (desktop vs. touch) and user authentication schemes (textual ...

    • Article  

      Investigating the relation between users' cognitive style and web navigation behavior with k-means clustering 

      Belk, Marios; Papatheocharous, Efi; Germanakos, Panagiotis; Samaras, George S. (2012)
      This paper focuses on modeling users' cognitive style based on a set of Web usage mining techniques on navigation patterns and clickstream data. Main aim is to investigate whether k-means clustering can group users of ...

    • Article  

      A personalized user authentication approach based on individual differences in information processing 

      Belk, Marios; Fidas, Christos A.; Germanakos, Panagiotis; Samaras, George S. (2015)
      An effective user authentication mechanism should embrace both security and usability aspects as its purpose is to ensure safety of operation of online services but as well usability and transparency to its end users. In ...

    • Article  

      Proposing a fuzzy adaptation mechanism based on cognitive factors of users for web personalization 

      Papatheocharous, Efi; Belk, Marios; Germanakos, Panagiotis; Samaras, George S. (2012)
      The increased demand of Web services and diverse characteristics of users have resulted in a plethora of applications that aim to provide personalized services based on the heterogeneous needs and preferences of users. ...

    • Book  

      Studying the effect of human cognition on text and image recognition CAPTCHA mechanisms 

      Belk, M.; Germanakos, P.; Fidas, C.; Spanoudis, George C.; Samaras, G. (2013)
      This paper investigates the effect of individual differences in human cognition on user performance in CAPTCHA tasks. In particular, a three-month ecological valid user study was conducted with a total of 107 participants ...

    • Conference Object  

      Supporting adaptive interactive systems with semantic markups and human factors 

      Belk, Marios; Germanakos, Panagiotis; Papatheocharous, Efi; Constantinides, Marios; Samaras, George S. (2012)
      This paper focuses on adapting Web environments based on cognitive factors of users. In particular, a semantic Web-based adaptation framework is proposed that enables authors to enrich Web content with semantic markups, ...

    • Conference Object  

      Towards a human-centered E-Commerce personalization framework 

      Belk, Marios; Germanakos, Panagiotis; Andreou, Panayiotis G.; Samaras, George S. (Institute of Electrical and Electronics Engineers Inc., 2016)
      This paper presents a personalization framework, namely PersonaWeb that adapts the visual and interaction design of E-Commerce Web environments based on human cognitive differences. In particular, it describes a user model ...

    • Conference Object  

      Using eye gaze data & visual activities to infer human cognitive styles: Method & feasibility studies 

      Raptis, George E.; Katsini, Christina P.; Avouris, Nikolaos M.; Belk, Marios; Fidas, Christos A.; Samaras, George S. (Association for Computing Machinery, Inc, 2017)
      Recent research provides evidence that individual differences in human cognitive styles affect user performance and experience in diverse application domains. However, state-of-The-Art elicitation methods of cognitive ...

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