A(n) ________ refers to the smallest change in physical energy between two stimuli that is recognized as different

Girls who mature early are more likely

a. to engage in earlier sexual relations. b. to be socially ostracized in middle and high school. c. to withdraw and become socially isolated. d. to become tall and thin.

The fourth system described by Bronfenbrenner, which is used to connect the other systems in his ecological-systems approach, is called the:

macrosystem. exosystem. microsystem. mesosystem.