NOBEL Prize-winning psychologist Daniel Kahneman has died at the age of 90. The pioneer researcher became famous for his groundbreaking theory on the human mind - described in the best-selling book "Thinking, Fast and Slow." 3 Nobel prize winner Daniel Kahneman died aged 90 Credit: AP 3 Former US President Barack Obama presents the Presidential Medal of Freedom to Kahneman in 2013 Credit: AFP The theory argues that humans do not make rational decisions based on self-interest but they often act on instinct. Alongside his longtime collaborator, Amos Tversky, Kahneman reshaped the field of economics, which mostly assumed that people...