Hormones and aggression
- Created by: 11pyoung
- Created on: 18-04-17 11:17
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- Hormones and aggression
- What is a hormone?
- Chemical messengers in the blood
- Produced by Glands
- Controlled by the Pituitary Gland
- Testosterone
- Androgen
- Sex Hormone
- Male hormone
- Produced by Testes/Ovaries
- Antenatal exposure to testosterone affects brain structure, spatial awareness is better and more aggressive behaviour is shown
- Hypothalamus and Amygdala are larger than normal
- Critical period
- Controlled by genes
- Androgen
- Evidence to support
- Rats observed
- Castrated vs control
- Castrated rats systemically had testosterone injected into them
- Aggression increased
- Control group felt increased competition and aggression
- Castrated rats systemically had testosterone injected into them
- Castrated vs control
- Neonatal, female rats given testosterone
- More sensitive to testosterone
- Increased aggression
- More sensitive to testosterone
- Rats observed
- Human studies
- Sex offenders
- Castrated
- Decreases aggression
- Castrated
- Puberty
- Boys
- More aggressive than females
- Strong correlation between increased age and aggression/fighting
- Doesn't show cause
- Boys
- Sex offenders
- Evaluation
- Direction of causality issues
- Reciprocal model
- Increased aggression increases testosterone
- Environmental conditions changed testosterone levels
- Marriage lowers testosterone
- Divorce increases testosterone
- Testosterone is an effect of dominance and not the cause of it
- Mazur and Booth
- Found individual testosterone levels varied across the lifespan according to environmental status
- Basal model
- Increased testosterone increases aggression
- Males more likely to get into fights
- Testosterone causes a change in a person's aggressive dominance as it is found that men with higher levels of testosterone were more likely to get arrested and use weapons in fights
- Increased testosterone increases aggression
- Reciprocal model
- Research on small animals
- Limits generalisability of findings
- Brain areas said to be affected by testosterone have different functions across species
- The Cingulate Gyrus in Monkeys is associated with fear aggression, in Dogs and Cats it is associated with irritability
- Brain areas said to be affected by testosterone have different functions across species
- Limits generalisability of findings
- Direction of causality issues
- What is a hormone?
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