books.google.cl - Flow is an optimal state of being in which active concentration and absorbtion in creative activity leads to the sense of completely suspended time—one is alert, energized, and free of self-consciousness. Through an extensive amount of case studies, controlled experiments, and research of historical...http://books.google.cl/books/about/Fluir.html?id=Hd5obkutaOYC&q=interacci%C3%B3n&utm_source=gb-gplus-shareFluir
