Hormonal explanations of Aggression

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Sapolsky 1 (T)
Middle ranking monkey= T only enhances existing aggression
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Saposky 2 (T)
Female hyenas dominant in wild= social
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Berthold (T)
Castrated cockrels less aggressive
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Motelico-Heino (T)
Mice castrated at birth less aggressive
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Davidson et al (S)
Seratonin lower in violent criminals and higher in domesticated animals
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Mann et al (S)
Seratonin reducing drugs to 5 adults= diffs only prominent in men= gender diffs
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Lenard (S)
Low seratonin= impulsion/ violence
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Badaway (S)
S link eplains violence and alcoholism- drinking causes inbalance of seratonin
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Davidson (S)
S doesn't explain brain structure influences
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Potegal (Br)
Hamsters have more active neurons in amygdala during aggressive acts
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Blair et al (Br)
Psychopathy involves damage to amygdala (psychopaths commonly violent)
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Gur et al (Br)
Women have proportionally larger frontal brain regions= greater inhibitory control of behaviour
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Lavine (D)
Increases in Dopamine via amphetamines associated with higher aggression
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Couppis et al (D)
Dopamine is reinforcer not cause- some seek aggressive acts for D hit (causality)
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Causality (Evaluation)
Requires removal of T pre-emptively= only on male animals- gender + ethics
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Precision (Evaluation)
Tampering of hormones= too invasive for humans
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Validity (Evaluation)
Operationalisation- correct measurement? Different studies measure/ quantify differently= reliability?
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Individual differences (Evaluation)
Naturally varying hormone balances= hard to determine normal levels
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Card 2

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Female hyenas dominant in wild= social

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Saposky 2 (T)

Card 3

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Castrated cockrels less aggressive

Back

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Card 4

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Mice castrated at birth less aggressive

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Card 5

Front

Seratonin lower in violent criminals and higher in domesticated animals

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