Watching violent shows makes children more aggressive.
Any statistical relationship, whether causal or not, between two random variables or bivariate data is referred to as correlation or dependency.
A positive correlation is a relationship between two variables that move in the same direction. A positive correlation exists when one variable declines while the other increases, or when one variable increases while the other falls.
A positive correlation between watching violence on tv and behaving aggressively would indicate that watching violent shows makes children more aggressive.