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Correct Answer (continued)

Ensure internal validity by

Randomly assigning children to the violent vs. nonviolent condition

Keeping experimenters unaware of the kind of game played by the child (to reduce experimenter bias)

Making sure children are not aware of the purpose of the study (to reduce participant bias)

Advantage: Can detect cause and effect relationship

Disadvantage: May not generalize to situations outside of the lab or to all kinds of aggressive behavior

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