Possible experiments vary, but it must be clear that students understand the elements of a study, such as identifying the independent variable as what is being manipulated (violent video content) and the dependent variables as what is being measured (aggression). How students operationally define these variables will vary, but it should be evident that this is an experiment that includes random assignment of participants to the various levels of the independent variable, and students propose a method for reducing confounds in the study. An example of a possible study would be to assign participants to one of two conditions—one that watches a nonviolent video (the control group) and one that watches the violent video (the experimental group). Aggression may be measured by how the individuals react when left in the room alone for a period of time after watching the video to wait for the experimenter to return to release them from the study. Their behaviors in the room could be observed and measured (e.g., number of times they pound on the locked door, etc.). Confounds that would need to be reduced include when the study occurs during the day, previous exposure to violent video games, age, and so on. These could be standardized or assessed to reduce their impact on the study.