Role of hormones

 AO1 (Explanation of hormones in aggression

• The hormonal explanation of aggression suggests that behaviour is influenced by hormones, particularly testosterone, cortisol and adrenaline.

• Testosterone is a hormone produced in the testes and ovaries and has been linked to increased aggressive behaviour and dominance.

• Cortisol is a stress hormone released in response to stressful situations and high levels can lead individuals to overreact or respond more emotionally to threats.

• Adrenaline is released during the fight-or-flight response, preparing the body to respond to danger, which can increase aggressive reactions in threatening situations.

• The dual hormone hypothesis suggests that testosterone is more likely to lead to aggression when cortisol levels are low.

AO3 (Supporting evidence + critique)

• For example, both Dolan and Dabbs independently studied men and women in prisons and found positive correlations between testosterone levels and aggressive behaviours and in particular with dominance within the prison.

• This highlights the validity of the association between testosterone and aggression as it has been found in both men and women.

• However these studies are correlational and for obvious ethical issues this is the only way, however they do not show whether testosterone levels rise as a result of violence or even if there is another factor involved.

• This is an issue because it suggests we cannot understand aggression through testosterone alone

AO3 (Limitation – dual hormone hypothesis)

• Evidence to support this comes from Pranjal Mehta.

• He suggests that high levels of testosterone are only a problem when levels of cortisol are low.

• And therefore perhaps the dual hormone hypothesis is a better predictor of human aggression.

AO1 (Other explanation)

• An alternative explanation is that aggression may be influenced by brain structures rather than hormones alone.

• For example, research by Adrian Raine found that individuals pleading NGRI had deficits in their prefrontal cortex.

• This area of the brain is responsible for impulse control, suggesting that biological factors other than hormones may influence aggression.

AO3 (Evaluate other explanation)

• For example, there may be other factors such as brain differences that may lead to aggressive behaviour.

• Raine found that murderers pleading NGRI had deficits in their prefrontal cortex.

• This is important as it highlights that understanding human behaviour such as aggression is complex and multiple factors may be at play and hormones alone can explain it.

AO1 (Application)

• The hormonal explanation can be applied in reducing aggression, particularly in criminal behaviour.

• For example, testosterone levels can be reduced through chemical treatments such as chemical castration in sexually aggressive offenders.

• This can help to reduce aggressive behaviour and lower rates of reoffending.

AO3 (Evaluate application)

• For example medication to lower testosterone levels.

• Testosterone can be chemically controlled particularly in sexually aggressive criminals.

• This is important and can lead to a lower aggression/crime rate and have positive implications on society.