Adopt a Loggerhead sea turtle

Christos A. Fidas is an Assistant Professor in the Department of Cultural Heritage Management and New Technologies, University of Patras, and a Research Associate at the HCI Group of the Interactive Systems Laboratory. He received a PhD from the Electrical & Computer Engineering Department, University of Patras.

Understanding users and applying User-Centred Design (UCD) methodologies is the main focus of his research and teaching activities. In this context, he is investigating the influence of human cognitive aspects in cultural heritage informatics and usable & secure information systems aiming to drive the design and development of bootstrapped solutions to the unique information processing characteristics of the end-users.

Email: fidas AT upatras.gr :: LinkedIn Profile: https://www.linkedin.com/in/fidas


[December 2017] Journal paper accepted at the International Journal of Human-Computer Studies, entitled "Effects of Mixed-Reality on Players' Behaviour and Immersion in a Cultural Tourism Game: A Cognitive Processing Perspective"

[December 2017] Full paper accepted at ACM SIGCHI 2018, entitled "Influences of Human Cognition and Visual Behavior on Password Security during Picture Password Composition"

[December 2017] Paper accepted for inclusion in the ACM SIGCHI IUI 2018 Papers' Programme, entitled "Eye Gaze-driven Prediction of Cognitive Differences during Graphical Password Composition"

[April 2017] Paper accepted at ACM SIGCHI UMAP 2017, entitled "Using Eye Gaze Data and Visual Activities to Infer Human Cognitive Styles: Method and Feasibility Studies"

[September 2016] Paper accepted at ACM SIGCHI CHI Play 2016, entitled "Do Field Dependence-Independence Differences of Game Players Affect Performance and Behaviour in Cultural Heritage Games?"


  • German Patent & Trade Mark Office (Deutsches Patent- und Markenamt): Method and apparatus for flexible user authentication based on individual human cognitive characteristics (Methode und vorrichtung zur flexiblen benutzerauthentifizierung basierend auf individuellen menschlichen kognitiven eigenschaften) – patent pending
  • Greek Industrial Property Organisation (Οργανισμός Βιομηχανικής Ιδιοκτησίας): Methods and tools to support and monitor in real time visitors of the World Wide Web (N. Patent No. 1004805.OVI, INT. CL G06F 17/60, g06f 15/163)

Selected Publications

Information Systems and Culture

Elsevier IJHCS
Raptis, G., Fidas, C.A., Avouris, N. (2018). Effects of mixed-reality on players' behaviour and immersion in a cultural tourism game: A cognitive processing perspective, International Journal of Human-Computer Studies, Elsevier ()
ACM CHI Play 2016
Raptis, G., Fidas, C.A., Avouris, N. (2016). Do field dependence-independence differences of game players affect performance and behaviour in cultural heritage games?, ACM SIGCHI Computer-Human Interaction in Play (CHI PLAY 2016), ACM Press, 38-43 [https://doi.org/10.1145/2967934.2968107]
ACM CHI 2011
Fidas, C.A., Voyiatzis, A.G., Avouris, N.M. (2011). On the necessity of user-friendly captcha. ACM SIGCHI Human Factors in Computing Systems (CHI 2011), ACM Press, 2623-2626 [http://dx.doi.org/10.1145/1978942.1979325]

Eye Tracking, Cognition and User Modeling

ACM IUI 2018
Katsini, C., Fidas, C., Raptis, G., Belk, M., Samaras, G., Avouris, N. (2018). Eye gaze-driven prediction of cognitive differences during graphical password composition. ACM SIGCHI Intelligent User Interfaces (IUI 2018), ACM Press (accepted)
Raptis, G., Katsini, C., Belk, M., Fidas, C., Samaras, G., Avouris, N. (2017). Using eye gaze data and visual activities to infer human cognitive styles: method and feasibility studies, ACM SIGCHI User Modeling, Adaptation and Personalization (UMAP 2017), ACM Press, 164-173 [https://doi.org/10.1145/3079628.3079690]
ACM CHI 2017
Raptis, G., Fidas, C., Avouris, N. (2017). On implicit elicitation of cognitive strategies using gaze transition entropies in pattern recognition tasks, ACM SIGCHI Human Factors in Computing Systems (CHI EA 2017), ACM Press, 1993-2000 [https://doi.org/10.1145/3027063.3053106]

Usable Security: User Authentication and Human Interaction Proofs

ACM CHI 2018
Katsini, C., Fidas, C., Raptis, G., Belk, M., Samaras, G., & Avouris, N. (2018). Influences of human cognition and visual behavior on password security during picture password composition. ACM SIGCHI Human Factors in Computing Systems (CHI 2018), ACM Press (accepted)
Elsevier CHB
Belk M., Fidas C., Germanakos P., & Samaras G. (2017) The interplay between humans, technology and user authentication: a cognitive processing perspective, Computers in Human Behavior (CHB), 76, 184-200, Elsevier [https://doi.org/10.1016/j.chb.2017.06.042]
Elsevier IJHCS
Belk M., Fidas C., Germanakos P., & Samaras G. (2015) Do human cognitive differences in information processing affect preference and performance of captcha?, International Journal of Human - Computer Studies (IJHCS), 84, 1-18, Elsevier [http://dx.doi.org/10.1016/j.ijhcs.2015.07.002]

Computer Supported Collaborative Learning

Elsevier Comp. Ed.
Fidas, C.A., Komis, V., Tzanavaris, S., Avouris, N. (2005). Heterogeneity of learning material in synchronous computer-supported collaborative modelling. Computers and Education, 44 (2), 135-154, Elsevier [http://dx.doi.org/10.1016/j.compedu.2004.02.001]
Springer Ed. IT
Komis, V., Avouris, N., Fidas, C.A. (2002). Computer supported collaborative concept mapping: Study of interaction. Education and Information Technologies, 7:2, 169-188, Springer-Verlag [http://dx.doi.org/10.1023/A:1020309927987]
Fidas, C.A., Komis, V., Avouris, N., Dimitracopoulou, A. (2002). Collaborative problem solving using an open modeling environment. Computer Support For Collaborative Learning: Foundations For A CSCL Community (CSCL 2002), Lawrence Erlbaum Associates, 654-655


I have worked as a project manager, user experience expert and information systems architect in numerous EU-funded, National and industrial research projects like:

  • FP7-CR-PLAY: Capture Reconstruct Play (2013-2016, WP5 Leader - Formative and Summative Evaluation) - http://www.cr-play.eu
  • FP7-SERIES: Seismic Engineering Research Infrastructures for European Synergies (2009-2013, Lead of Information Systems Architecture Design and Implementation) - http://www.series.upatras.gr
  • FP6-QALIBRA: Quality of life-integrated benefit and risk analysis web-based tool for assessing food safety and health benefits (2006-2010, Lead of Evaluation) - http://www.qalibra.eu
  • FP6 e-Ten-COMMODE: Collaborative modeling environment (2005-2006, Lead of Evaluation and Pilot Studies)
  • IST-MODELLINGSPACE: Space of ideas expression modeling and collaboration (2001-2004, Software Engineer)


Assistant Professor (2016-), Tenure-track Lecturer (2013-2016) at the Department of Cultural Heritage and New Technologies, University of Patras

  • New Interactive Media (M.Sc.)
  • Human-Computer Interaction (B.Sc.)
  • Structural Programming (B.Sc.)
  • Visual Programming (B.Sc.)
  • Pervasive Computing and Cultural Heritage (B.Sc.)

Visiting Assistant Professor at the Department of Computer Science, University of Cyprus (2011-2013)

  • Human-Computer Interaction (B.Sc.)
  • Programming Priniciples for Engineers (B.Sc.)
  • Operating Systems (B.Sc.)
  • Introduction to Computer Science (B.Sc.)


Prospective Students

I am always happy to discuss with prospective students new research endeavors in the areas of Information Systems and Culture, Modelling Human Cognition in Interactive Systems, and Usable Security. If you are interested to discuss your research idea please don't hesitate to contact me at fidas AT upatras.gr

Suggested Topics for Ph.D.
  • AR and VR Effects on Human Cognition within Cultural Heritage Informatics
  • Investigating the Effects of Human Emotions in User Authentication
  • Adaptable User Authentication in Ubiquitous Computation Realms

Current Ph.D Students

  • Argyris Constantinides (with University of Cyprus): Leveraging on Users' Cultural Factors for Increasing Graphical Password Memorability and Security - Jan. 2018-
  • George Raptis: A Personalized Cultural Heritage Framework based on Human Cognitive Processing - Sept. 2016-
  • Christina Katsini: Methods and Techniques for Usable and Secure User Authentication in Natural User Interaction - Sept. 2016-