In children in full-time child care, cortisol levels ________ during the day. Cortisol levels of children at home ________ during the day

In the United States today, about 10-11% of grandparents are raising their grandchildren, and this percentage is much higher among African American and Native American families

Indicate whether the statement is true or false

When two variables are linked and their individual effects cannot be isolated, we speak of the variables as being

a. independent variables. b. dependent variables. c. confounded variables. d. codependent variables.