I've just finished the book ”Bursts: The Hidden Pattern Behind Everything We Do” by Barabasi. Great reading, I really enjoyed it! And why is my blog about this book?
Albert-Laszlo Barabasi is one of the world's preeminent researchers on the science of networks. ”Bursts” opens a door into the human dynamics. Before reading the book your life may look random to you. But everything from your visits to a web page to your mobile phone calls are predictable, and happen in bursts.
Human dynamics is a new branch of complex systems research in statistical physics. Its main goal is to apply the powerful conceptual toolbox developed by Physicists to study the natural world to the study of human behavior. (Wikipedia)
What about adherence, is it also predictable with a mathematical formula?