In addition to measuring the Body Concern of the participants who joined a fraternity/sorority both immediately before and immediately after they join, Dr. Ba measures them for the three weeks before and the three weeks after. This type of design would be able to better address which of the following threats to internal validity?
RESEARCH STUDY 13.1: Dr. Ba is interested in whether joining a fraternity/sorority causes people to become more concerned about their attractiveness. She recruits a group of 55 freshmen (25 men, 30 women) who are planning to go through fraternity/sorority recruitment on her campus. After they join, she gives them a measure of attractiveness concern (the Body Concern Scale). In addition to measuring the Body Concern of the participants who joined a fraternity/sorority both immediately before and immediately after they join, Dr. Ba measures them for the three weeks before and the three weeks after. This type of design would be able to better address which of the following threats to internal validity?
In addition to measuring the Body Concern of the participants who joined a fraternity/sorority both immediately before and immediately after they join, Dr. Ba measures them for the three weeks before and the three weeks after. This type of design would be able to better address which of the following threats to internal validity?