The purpose of the current study is to examine physiological and behavioral components of emotional regulation and the development of empathy in preschoolers. It also examines how the parents play a role in their child's development of emotional competence. Behavioral and physiological responses were assessed for the children during stories chosen for emotional content (one happy and one sad story for each parent). Maternal and paternal ratings of self-expressivity were collected using the Self- Expressiveness in Family Questionnaire (Halberstadt et al., 1995). Greater vagal suppression occurred during the sad conditions suggesting that negative emotions require more processing strategies. Greater attentional scores were related to the child's RSA and higher resting RSA was associated with great motor restriction. The mothers had higher SEFQ scores than the fathers. Higher maternal positive expressivity, lower maternal total expressivity, and lower paternal positive expressivity scores were related to the children's displays of empathy. / by Kathryn L. Marsh. / Thesis (M.A.)--Florida Atlantic University, 2013. / Includes bibliography. / Mode of access: World Wide Web. / System requirements: Adobe Reader.