The Learning About Feelings (LEAF) study is a one year longitudinal study funded by a National Institute of Mental Health (NIMH) K23 grant.  The study will examine how children between the ages of three and five years implement different emotion regulation strategies.  Children will play computer games while wearing a functional Near Infrared Spectroscopy (fNIRS) cap to examine prefrontal cortex activation, and two galvanic skin response leads on their palm and a respiration belt to examine their autonomic nervous system response.  Our goal is to understand how differences in early emotion regulation predict changes in behavior across early childhood.