SEROTONIN (+DOPAMINE):
- + Human - Mann et al (1990) 35 adult volunteers given dexfenfluramine - red. SN levels - used quest. to measure hostility levels and agg. - incr. in males but not females
- - ethics - not leaving same way they came in/questionnaire - self-report DCs/men + SDB - feel shld be more agg/variables not controlled for - causality/sml sample - can't generalise
- + Animals - Popova et al (1991) - silver foxes bred for selectively bred for docility + domestication for 30yrs > SN than wild members of same sp
- - unethical to do to animals - no IC - can't generalise to humans
- + Lavine (1997) - incr. DP activity from amphetamines assoc. w/ incr. agg beh
- - only ever correlations - no causality
TESTOSTERONE (+ CORTISOL):
- real world - women < T and are < agg than men. but cld also be bc of soc gender roles
- + Archer (1991) - meta-analysis 230 men, 5 studies low +ve Corr betw T and agg type of p/form of agg/measurement type differed betw studies -CORRELATIONS
- Virkkunen (1985) - habitual violent offenders have low levels of Cort.
- gender bias/small samples/contradictory ev/causality
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