A recent survey found that ________ of girls younger than 16 years of age did not use any contraception the first time they had sexual intercourse

Select the statement that most accurately represents a perspective based on the decremental model of aging.

A) "I can't go shopping this weekend because I have to go to my grandmother's graduation ceremony." B) "I've got arthritis, hardening of the arteries, and insomnia, but what do I expect? I'm 75 years old!" C) "I'm 70 years old, and I'm training for the next marathon." D) "The doctor tells me that I have heart disease because I've eaten poorly all of my life."

To better understand bulimia among college students, a researcher lives in a female freshman dorm for the fall semester to observe and interview students about their stresses, attitudes, and eating behaviors. This is an example of what type of study?

a. analogue c. experimental b. field d. case