Dual Process Theory suggests we have two general modes, or systems, of thinking that we use to navigate our every day lives. System 1 refers to our automatic, reactive, emotional, unconscious thought processes that occur almost instantaneously without conscious effort. System 2 refers to our mode of thinking that  slow, deliberate, intentional, and analytical. This topic is fundamental for understanding how to build intuitive product experiences.   3 months free off yearly subscription for Interaction Design Foundation: Interested in boosting your career in UI/UX or learning how to build world-class products? The Interaction Design Foundation is offering 3 free months off your yearly membership to Actionable UX Podcast listeners! Use the link below to take advantage of this exclusive offer:https://www.interaction-design.org/learn-ux-design?ep=the-actionable-ux-podcast   References: Kahneman, Daniel. Thinking, Fast and Slow. New York: Farrar, Straus and Giroux, 2011. Print. Poole, Steven. The VR Book: Virtual Reality in Art and Culture. London: Laurence King, 2017. Print. Nielsen, Jakob. "Mental Models." Nielsen Norman Group, 2005, www.nngroup.com/articles/mental-models/. Nielsen, Jakob and Whitenton, Kathryn. The Aesthetic-Usability Effect. Nielsen Norman Group. 2007. https://www.nngroup.com/articles/aesthetic-usability-effect/. Evans, J. S. B., & Stanovich, K. E. (2013). Dual-process theories of reasoning. Annual review of psychology, 64(1), 255-286. Kahneman, D. (2011). Thinking, fast and slow. New York: Farrar, Straus and Giroux. Stanovich, K. E. (1999). Who is rational? Studies of individual differences in reasoning. New York: Oxford University Press. Wason, P. C. (1966). Reasoning. In B. M. Foss (Ed.), New horizons in psychology (pp. 135-171). Harmondsworth, UK: Penguin. Evans, J. S. B. (1984). Heuristic and analytic processing in reasoning. British Journal of Psychology, 75(4), 451-466. Evans, J. S. B., & Over, D. E. (1996). The two faces of reason: A dual-process account of reasoning. Trends in cognitive sciences, 1(1), 46-52. Stanovich, K. E. (1999). Who is rational? Studies of individual differences in reasoning. New York: Oxford University Press. Stanovich, K. E., & West, R. F. (2000). Individual differences in reasoning: Implications for the rationality debate?. Behavioral and brain sciences, 23(5), 645-665. Stroop, J. R. (1935). Studies of interference in serial verbal reactions. Journal of Experimental Psychology, 18(6), 643-662. http://psychclassics.yorku.ca/Stroop/. Frederick, Shane. (2005). Cognitive Reflection and Decision Making. American Economic Review, 95(4), 829-836. https://doi.org/10.1257/089533005775196732.