Not only health, but also almost every other indicator of a good life—high income, stable marriage, successful children, satisfying work—correlates with ________

A difference threshold is operationally defined as the

a. point at which two stimuli sometimes are recognized as different. b. point at which two stimuli are recognized as different half of the time. c. point at which two stimuli are recognized as different all of the time. d. smallest quantity of physical energy that can be detected.

In Western countries, conflict with parents _______________________________

a. remains constant during adolescence b. steadily increases until the end of emerging adulthood c. declines in late adolescence d. is highest during middle childhood