24 0.67 points I theorized that becoming a crime victim violates individuals' belief that the world is a fair and predictable place, which has a harmful effect on their mental health. I used survey data from a sample of Florida adults to test the following hypothesis: If an individual was victimized during the past year, he or she will be more likely to screen positive for depression. I found that 35% of those who were victimized in the past year screened positive for depression, versus 20% of those who were not victimized in the past year. My colleague suggested that problem alcohol use may lead to both victimization and depression, and thus may explain the observed association. She is criticizing my study's: Random assignment External validity Internal validity Correlation