The Brain and Aggression (Edexcel A-Level Psychology): Flashcards

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The Role of Hormones in Aggression
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Hormones

Chemical messengers that travel through bloodstream

Testosterone hormone type

An androgen - develops/maintains male characteristics

Organisational effect of testosterone

Antenatal exposure creates lasting brain structural changes

Critical period for testosterone

Immediately after birth - sensitises neural circuits

Effect of castration in rodents

Eliminates aggression; reversed by testosterone replacement

Serotonin effect on aggression

Increased activity inhibits; low levels increase aggression

Basal model of testosterone

Testosterone as persistent trait that directly causes aggression

Reciprocal model of testosterone

Testosterone both causes and is consequence of aggression

Mazur (1983) testosterone finding

Strong positive correlation with aggression in adolescence

Species difference: cingulate gyrus

Fear-aggression in monkeys; irritability in dogs/cats

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