Matthijs Koopmans joined the faculty at Mercy College in 2011. His areas of interest are cause and effect relationships, complexity theory and quantitative single case designs. He has published papers in numerous refereed journals, and is one of the editors of Chaos and Complexity in Psychology: The Theory of Nonlinear Dynamical Systems, published by Cambridge University Press in 2009. His most recent research is on daily high school attendance patterns and the dynamics of school reform. He earned his doctorate at Harvard Graduate School of Education in 1988.