What does the null hypothesis in Brendgen's practical suggest?

• A. There is a strong relationship between stress and aggression
• B. Any relationship between stress and aggression is due to chance
• C. Stress events increase social aggression
• D. Aggressive tendencies lead to more stress events

Answer: (B)

The null hypothesis often serves as a foundational concept in hypothesis testing, stating that there is no effect or relationship between the variables being studied. In the context of Brendgen’s work, the null hypothesis posits that any observed relationship between stress and aggression is not significant and could occur by random chance. This means that if the null hypothesis holds true, there would be no reliable evidence to suggest that stress directly influences levels of aggression.

This concept is vital in research as it provides a baseline to compare against when determining whether other hypotheses—such as those suggesting that stress directly affects aggressive behavior—are supported by the data. If the data shows a significant relationship, researchers may reject the null hypothesis, thereby supporting the idea that there is an actual connection between stress and aggression.