A group of scientists notices that people who smoke often develop cancer later in life. To test this, they design a longitudinal study in which they take note of how many cigarettes each participant smokes each day, how many years each participant smokes, and whether he or she develops any kind of cancer at any point. What type of study is this?

Question

Quizplus · Accepted Answer

This is a correlational study because the researchers are observing the relationship between smoking and cancer without manipulating any variables. They are simply tracking the level of smoking and cancer diagnoses among participants over time.

A Group of Scientists Notices That People Who Smoke Often