Essay from the year 2015 in the subject Psychology - Miscellaneous, grade: 1,0, Kozminski University, course: Principles of Psychology, language: English, abstract: The term 'cognitive bias', also known as 'psychological bias', was first mentioned by Amos Tversky and Daniel Kahneman at the beginning of the 1970s. It describes a phenomenon which happens uncountable times a day within the human brain: making decisions and judging issues although facing various limitations, such as, information or time. By using a heuristic tool one reaches a satisfying conclusion (cf. Wilke and Mata, 2012) The paper on hand focuses on the confirmation bias.