In which year did Brendgen et al. conduct their study on social aggression?

• A. 2003
• B. 2005
• C. 2007
• D. 2009

Answer: (B)

Brendgen et al. conducted their pivotal study on social aggression in the year 2005. This study is often referenced in discussions of how social and relational aggression manifests among children and its links to various psychological outcomes. The research provided significant insights into the developmental aspects of aggression and highlighted how both genetic and environmental factors play a role in the expression of aggressive behaviors in social contexts. By pinpointing the year to 2005, it situates the study within a broader framework of psychological research occurring around that time, thereby allowing for a better understanding of its impact on subsequent literature and studies in the field of biological psychology.