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Justify the researchers' decision to use a partial correlation in this scenario, and explain what this statistical technique will help them determine regarding television violence and aggression.
Case context: A research team observes a positive correlation between the amount of television violence children watch and their level of aggressive behavior. However, critics argue that a potential third variable, parental supervision, might be responsible for this observed relationship. Instead of holding supervision constant through an experimental design, the researchers measure parental supervision alongside the other two variables and decide to conduct a partial correlation.
Question: Justify the researchers' decision to use a partial correlation in this scenario, and explain what this statistical technique will help them determine regarding television violence and aggression.
Sample answer: The researchers decided to use a partial correlation because it allows them to statistically control for the potential third variable of parental supervision. This technique helps them determine whether the relationship between watching television violence and aggressive behavior exists independently of how much parental supervision the children receive.
Key points:
- Justifies partial correlation as a method to statistically control for the third variable of parental supervision.
- Explains that the technique isolates the relationship between television violence and aggressive behavior.
- States the goal is to determine if the relationship exists independently of the controlled third variable.
Rubric: The response should correctly explain that the analysis controls for parental supervision to test if the link between television violence and aggression is an independent relationship.
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Research Methods in Psychology - 4th American Edition @ KPU
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Example of Partial Correlation: Television Violence and Aggression
Limitations of Partial Correlation
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