The flow experience is a state of complete involvement in an activity that requires complete concentration (Csikszentmihalyi, 1999). Flow is characterised by the matching of high environmental challenges with equally high levels of personal skills, the merging of action and awareness, the loss of reflexive self-consciousness, a sense of control and a distortion of temporal experiences (Nakamura & Csikszentmihalyi, 2005).

Have you ever spent half an hour searching the internet which, as you find out afterwards, lasted three hours? Or opened a book shortly after breakfast and a little while later noticed that the room was getting darker?