His research examines socioemotional development - particularly in adolescence - from dynamic systems (DS) and developmental psychopathology perspectives. Specifically, he focuses on the regulation of emotion, particularly shame and anxiety, as evidenced by changes in self-reported feelings, autonomic psychophysiology, and behavioural expressions. In addition, he has developed, distributed, and applied quantitative methods to analyze processes of change, such as state space grids (www.statespacegrids.org).