Question

a factor determined by the conditions set up in an experiment
controlled variable constant variable
dependent variable independent variable

Explanation:

In experimental design, the independent variable is the factor that is manipulated or set by the experimenter (determined by the conditions set up in the experiment). A controlled variable is kept constant to avoid interference, a constant variable is unchanged throughout, and a dependent variable is the outcome measured (depends on the independent variable). So the term matching "a factor determined by the conditions set up in an experiment" is independent variable.

Answer:

independent variable