A researcher who examines the relationship between individuals' tooth flossing frequency and the incidence of heart disease in these individuals is using the ______ research design.
A) experimental
B) quasi-experimental
C) case study
D) correlational

Question

Quizplus · Accepted Answer

The researcher is examining the relationship between two variables (tooth flossing frequency and incidence of heart disease), so the correlational research design is the most appropriate. The study is not manipulating any variables (experimental design) or comparing groups without random assignment (quasi-experimental design). A case study research design usually focuses on a single individual, while this study involves a larger group of individuals.

A Researcher Who Examines the Relationship Between Individuals' Tooth Flossing