Final answer:
Dr. Kennison is analyzing binge drinking at the individual level, while Dr. Leblanc is studying it at the societal level, focusing on the influence of living on campus.
Step-by-step explanation:
Dr. Kennison is analyzing binge drinking at the individual level by associating it with personality traits such as conscientiousness, while Dr. Leblanc is studying binge drinking at the societal level by relating it to the proportion of students living on campus. The approach taken by Dr. Kennison focuses on the internal characteristics and behaviors of a person, indicative of a psychological perspective. In contrast, Dr. Leblanc's research is concentrated on the external societal factors that could influence the prevalence of binge drinking, such as the college environment and the living arrangements of students.