In the roughly one-third of the day that is free of obligations, in their precious ‘leisure’ time, most people in fact seem to use their minds as little as possible. The largest part of free time – almost half of it for American adults – is spent in front of the television set. The plots and characters of the popular shows are so repetitive that although watching TV required the processing of visual images, very little else in the way of memory, thinking, or volition is required. Not surprisingly, people report some of the lowest levels of concentration, use of skills, clarity of thought, and feelings of potency when watching television…the information we allow into consciousness becomes extremely important; it is, in fact, what determines the content and quality of life.
-Mihaly Csikszentmihalyi, Flow: The Psychologybof Optimal Experience