A(n) ________ is a measure of the relationship between two or more variables

Regarding ADHD and medication:

A. Stimulants are the most common medication used in the treatment of ADHD. B. Medications are rarely used in the treatment of ADHD. C. Benzodiazepines are the most commonly used medication in the treatment of ADHD. D. Antidepressants are the most commonly used medication to treat the symptoms of ADHD.

Piaget's concept of egocentrism refers to the child's

a. desire to be at the center of every else's interest. b. development of an ego. c. belief that others see the world exactly as she or he does. d. assumption that everyone understands what she or he is saying. e. belief that she or he is more important than anyone else.