The dependent variable is "sexual activity."
The two primary variables in a test are the independent and dependent variable.
An independent variable is the variable that is changed or controlled in a logical test to test the consequences for the needy variable.
A dependent variable is the variable being tried and estimated in a logical analysis.
The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the impact on the dependent variable is watched and recorded.