E. App and G. Debus, Saccadic velocity and activation: development of a diagnostic tool for assessing energy regulation, Ergonomics, vol.14, issue.5, pp.689-697, 1998.
DOI : 10.1007/BF00288906

C. Banga and J. Weinhold, Essential M obile Interaction Design: Perfecting Interface Design in M obile Apps, 2014.

R. Belveal, Where Have All the Affordances Gone?, 2013.

M. E. Crosby, M. K. Iding, and D. N. Chin, Visual Search and Background Complexity: Does the Forest Hide the Trees?, UM 2001. LNAI, pp.225-227, 2001.
DOI : 10.1007/3-540-44566-8_28

D. Stasi, L. L. Antolí, A. Cañas, and J. J. , Main sequence: An index for detecting mental workload variation in complex tasks, Applied Ergonomics, vol.42, issue.6, pp.807-813, 2011.
DOI : 10.1016/j.apergo.2011.01.003

J. Enders, Flat UI and Forms, 2013.

K. Hou and C. Ho, A Preliminary Study on Aesthetic of Apps Icon Design, 5th International Congress of the International Association of Societies of Design Research 2013, 2013.

S. Idler, Flat Web Design Is Here to Stay . Usabilla, 2013.

J. Nielsen, Windows 8 ? Disappointing Usability for Both Novice and Power Users, 2012.

C. Noessel, Your Flat Design Is Convenient for Exactly One of Us01/your-flat-design-is- convenient-for-exactly-one-of-us, 2014.

T. Page, Skeuomorphism or flat design: future directions in mobile device User Interface (UI) design education, International Journal of Mobile Learning and Organisation, vol.8, issue.2, pp.130-142, 2014.
DOI : 10.1504/IJMLO.2014.062350

URL : https://dspace.lboro.ac.uk/dspace-jspui/bitstream/2134/17188/3/skeuomorphism.pdf

M. Pomplun, E. M. Reingold, and J. Shen, Investigating the visual span in comparative search: the effects of task difficulty and divided attention, Cognition, vol.81, issue.2, pp.57-67, 2001.
DOI : 10.1016/S0010-0277(01)00123-8

J. A. Renshaw, J. E. Finlay, D. Tyfa, and R. D. Ward, Designing for Visual Influence: An Eye Tracking Study of the Usability of Graphical M anagement Information, pp.144-151, 2003.

T. Schneidermeier, F. Hertlein, and C. Wolff, Changing Paradigm ? Changing Experience? Comparative Usability Evaluation of Windows 7 and Windows 8, DUXU 2014, Part I. LNCS, pp.371-382, 2014.

C. Stickel, H. Pohl, and J. M-ilde, Cutting Edge Design or a Beginner's M istake? ? A Semiotic Inspection of iOS7 Icon Design Changes, DUXU 2014, Part II, pp.358-369, 2014.

B. M. Velichkovsky, Heterarchy of Cognition: The Depths and the Highs of a Framework for M emory Research The ABCs of Website User Experience, pp.405-419, 2002.

G. J. Zelinsky and D. L. Sheinberg, Eye movements during parallel???serial visual search., Journal of Experimental Psychology: Human Perception and Performance, vol.23, issue.1, pp.244-262, 1997.
DOI : 10.1037/0096-1523.23.1.244

URL : http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.330.3396