Familial environment associated with type A behaviors and psychophysiological responses to stress in children.

: This study tested two major hypotheses regarding the characteristics of family environments associated with children's Type A behaviors, anger frequency and expression, hostile outlook, hostility displayed during an interview, and cardiovascular responses to laboratory stressors. Two measures of family environment, Positive Affiliation and Authoritarianism, were derived by a factor analysis of the Family Environment Scale completed by parents. The sample consisted of 66 girls and 48 boys enrolled in Grades 2 through 12 from 114 families residing in a predominantly White, upper-middle-class suburb of Pittsburgh. Analyses largely supported the first hypothesis--that a less supportive and positively involved family climate would be associated with attributes of potential coronary heart disease (CHD) risk in children. Families scoring low on Positive Affiliation had children who were assessed as more angry and hostile on the basis of questionnaires and interview. Boys from these families had a more pronounced heart rate response to all laboratory stressors. The second hypothesis--that authoritarianism, in the absence of positive involvement and supportiveness in the family, would be associated with attributes of potential CHD risk in children--received support in regard to boys' heart rate responses to the serial-subtraction and mirror-image-tracing tasks. High Authoritarianism scores in combination with low Positive Affiliation scores in families predicted a heightened heart rate response in boys. Sex differences in the pattern of associations among family and child characteristics were also found. Results suggest that factors in the family environment may be important influences in children's development of characteristics that may, in adulthood, place them at risk for CHD.