If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...

Tucker, A. L., and Amy C. Edmondson. "Managing Routine Exceptions: A Model of Nurse Problem Solving Behavior." Advances in Health Care Management 3 (2002): 87–113.

Our brains are much more active when we daydream than previously thought. Activity in numerous brain regions increases when our minds wander, according to new research. Psychologists found that brain ...