If you see in our hypothesis, we used, we actually defined variables .
Variables are phenomena that change such as personality characteristics, condition or abilities.
There are usually two types of variables in a psychology experiment, the dependent variable and the independent variable . The independent variable is the variable that the researcher will manipulate or change directly. The dependent variable is the variable that is directly affected by the independent variable. One of the things you have to keep in perspective when defining the dependent variable is how will you go about measuring this variable. For example, suppose we were trying to determine how happy a person was.