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 Optimal_Flow in_Human-Computer Interaction. The Journal_of Psychology,_128(4),_381-391. 268_Oana_Culache and Daniel_Rareș Obadă /_Procedia Social and Behavioral_Sciences 149 (_2014_) 261 – 268 Gibson, J. J. (1977). The theory of affordances. In R._Shaw,_& J._Bransford_(Eds.),_Perceiving, Acting and Knowing (pp._67-82). Hillsdale, NJ: Erlbaum. Halliday,_M. A._K. (1978). Language as a Social Semiotic. London:_Edward_Arnold. Ho, L._A. & Kuo, T. H. (2010). How can one_amplify the effect of e-learning? An_examination of high-tech_employees'_computer_attitude and flow experience._Computers in Human Behavior, 26(1), 23-31._Hoffman, D. L. & Novak, T._P. (1996). Marketing in Hypermedia Computer-Mediated Environments:_Conceptual Foundations. Journal of Marketing, 60(3),_50-68. Hoffman, D. L. &_Novak, T._P. (2009). Flow Online: Lessons_Learned and Future_Prospects. Journal_of Interactive Marketing,_23(1), 23-34. Huang, M. H. (2003)._Designing websites attributes_to induce experiential encounters. Computers in_Human_Behavior, 19(4), 425-442._Huang,_M._H. (2006)._Flow, Enduring and_Situational_Involvement in_the_Web Environment: A Tripartite Second-Order Examination._Psychology_and Marketing, 23 (May), 383–411. Koufaris, M._(2002). Applying the Technology_Acceptance_Model and Flow Theory_to Online Consumer Behavior. Information_Systems Research, 13(2), 205-223. Kress, G._(2005). Literacy_in the_New Media Age. Taylor & Francis e-Library. Kress, G. (2010). Multimodality:_A Social Semiotic Approach to Contemporary_Communication. New York: Routledge._Kress, G._&_van Leeuwen, T._(2006)._Reading Images:_The Grammar of Visual Design (2nd ed.)._London &_New York: Routledge. Lemke, J. L._(1998). Multiplying meaning: visual_and_verbal semiotics in scientific text. In_J. Martin & R. Veel (Eds.),_Reading science: