Bio. models assume aggress. located within bio. make-up of individ. rather than environ. around them --> Research studies last 30yrs show violent criminal were high in testosterone ..castration of highly aggressive males ..stop killing/injuring innocent --> H/W relationship b/twn bio. mechanisms & aggressive behaviour not simple
Neurotransmitters = chemicals enable impulses in brain to transmitted from 1 area of brain to another --> At least two linked to A.Beh: serotonin & dopamine
Serotonin reduces aggression inhibits response emotional stimuli that lead aggression --> Low levels of serotonin=impulsive behaviour/aggression/violent suicide --> Drug (Beta-blockers or BZs) reduce serotinin increase aggression -->MANN: drug that reduced serotonin linked aggression --> Used QUESTIONNARE= lack internal validity .. DCs=SD --> findings androcentric cant generalised women b/c bio. diff. in terms of hormones (testosterone) which affects aggression.
RALEIGH: added SUPPORT import. of serotonin in aggress. .. VERVET MONKEYS--> Diets high in tryptophan (increases serotonin) decreased levs/ of aggress. --> suggests diffs. in aggress. linked to levs. of serotonin --> METHODOLOGY: NON-HUMAN study.. generalisability zoocentric --> aplication limited humans & animals bio. diff.
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