Christos A. Fidas received a diploma and PhD from the Electrical & Computer Engineering Department, University of Patras, Greece. Currently he is an Assistant Professor in the Department of Cultural Heritage Management and New Technologies, University of Patras, and a Senior Researcher in the Interactive Technologies Lab, University of Patras. His research interests are related to human computer interaction, information systems and cultural heritage.

He has been actively engaged in numerous EU research and industrial projects in relation to various IT application domains. He has registered one patent  "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). He speaks fluently German, English and Greek.

Selected Publications

For a detailed list of publications please visit [Google Scholar]

Information Systems and Culture

Cultural Heritage Gaming
Raptis, G., Fidas, C., Avouris, N. (2017). Cultural heritage gaming: Effects of human cognitive styles on players' performance, experience and visual behavior, ACM Workshop on Personalized Access to Cultural Heritage (PATCH 2017), ACM Press, 343-346 [https://doi.org/10.1145/3099023.3099090]
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]
Raptis, G., Fidas, C.A., Avouris, N. (2016). A qualitative analysis of the effect of wholistic-analytic cognitive style dimension on the cultural heritage game playing. IEEE Information, Intelligence, Systems & Applications (IISA 2016), IEEE, 1-6 [https://doi.org/10.1109/IISA.2016.7785364]
Springer EuroMed 2016
Raptis, G., Fidas, C.A., Avouris, N. (2016). Differences of field dependent/independent gamers on cultural heritage playing: An eye-tracking study, Springer Conference on Digital Heritage (EuroMed 2016), Springer-Verlag, 199-206 [https://doi.org/10.1007/978-3-319-48974-2_22]
Fidas, C., Sintoris, C., Yiannoutsou, N., Avouris, N. (2015). A survey on tools for end user authoring of mobile applications for cultural heritage. IEEE Information, Intelligence, Systems & Applications (IISA 2015), IEEE, 1-5 [https://doi.org/10.1109/IISA.2015.7388029]

Users' Cultural Aspects in Interaction Design
Springer INTERACT 2013
Fidas, C.A., Voyiatzis, A.G. (2013). On Users’ Preference on localized vs. latin-Based CAPTCHA challenges. IFIP TC13 Conference on Human-Computer Interaction (INTERACT 2013), Springer, 358-365 [https://doi.org/10.1007/978-3-642-40498-6_28]
ACM CHI 2011
Fidas, C.A., Voyiatzis, A.G., Avouris, N.M. (2011). On the necessity of user-friendly captcha. ACM SIGCHI on 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

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 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.A., Avouris, N. (2016). On implicit elicitation of cognitive strategies using gaze transition entropies in pattern recognition tasks, ACM Human Factors in Computing Systems (CHI EA 2017), ACM Press, 1993-2000 [https://doi.org/10.1145/3027063.3053106]
ACM PCI 2016
Raptis, G., Fidas, C.A., Avouris, N. (2016). Using eye tracking to identify cognitive differences: a literature review. ACM Panhellenic Conference on Informatics (PCI 2016), ACM Press, paper 21 [https://doi.org/10.1145/3003733.3003762]

Usable Security: User Authentication and CAPTCHA

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]
ACM CHI 2017
Katsini, C., Fidas, C., Belk, M., Avouris, N., & Samaras, G. (2017) Influences of users’ cognitive strategies on graphical password composition, ACM Human Factors in Computing Systems (CHI EA 2017), ACM Press, 2698-2705 [https://doi.org/10.1145/3027063.3053217]
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]
Interacting with Computers
Belk, M., Fidas, C., Germanakos, P., & Samaras, G. (2015). A personalized user authentication approach based on individual differences in information processing. Interacting with Computers, 27(6), 706-723, Oxford University Press [http://dx.doi.org/10.1093/iwc/iwu033]
ACM CHI 2015
Fidas, C., Hussmann, H., Belk, M., & Samaras, G. (2015). iHIP: Towards a user centric individual human interaction proof framework. ACM Extended Abstracts on Human Factors in Computing Systems (CHI 2015), ACM Press, 2235-2240 [http://dx.doi.org/10.1145/2702613.2732748]

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


  • New paper accepted at Elsevier Computers in Human Behavior (5-Year Impact Factor: 3.724) [April. 2017]
  • Our paper that presented a method and feasiblity studies for modeling human cognitive styles through eye gaze data has been accepted at ACM UMAP 2017 [April. 2017]
  • Our paper that investigated field dependence-independence differences within cultural heritage games has been accepted at ACM CHI Play 2016 [Sept. 2016]
  • I am proud and happy that Mr. Marios Belk, whom I co-supervised and collaborated with during his PhD, succesfully defended his thesis [Dec. 2015]
  • Our paper "A Personalisation Method based on Human Factors for Improving Usability of User Authentication Tasks" was nominated for the Best Paper Award at Springer UMAP 2014 [July 2014]
  • I am grateful for spending two fruitful years as a Visiting Assistant Professor at the Department of Computer Science, University of Cyprus [June 2013]
  • Our paper "On the Necessity of User-friendly CAPTCHA" was accepted at ACM CHI 2011 [February 2011]

Research Projects

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)


Scientific Community Service

  • Reviewer in journals: IEEE Internet Computing Magazine, IBM Journal of Research and Development, Computers in Human Behavior, Interacting with Computers, Journal of Systems and Software, Journal of Information Security and Applications, International Journal of Human-Computer Interaction, International Journal of Human-Computer Studies
  • Reviewer in conferences: ACM CHI, ICALT IEEE, IFIP INTERACT, ACM NordiCHI


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.)

Ph.D. Thesis Supervision

  • George Raptis: A Personalized Cultural Heritage Framework based on Human Cognitive Processing - 2016-
  • Christina Katsini: Methods and Techniques for Usable and Secure User Authentiction in Natural User Interaction - 2016-
  • Marios Belk: Adaptive usable security: Personalising user authentication and captcha based on individual differences in cognitive processing - Completed: December 2015

Contact Information

Address: Department of Cultural Heritage Management and New Technologies, University of Patras, 2 Seferi Street, 30100 Agrinio, Patras, Greece
Email: fidas AT upatras.gr