L10 Aggression

10 important questions on L10 Aggression

If we set aggression in a historical perspective, are we living in an aggressive area?

No, the most peaceful is now

How is aggression explained in context of a biological model?

Social risk, biological risk and biosocial interaction can cause violence


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Can malnutrition early in life lead to aggressive behaviour later in life? [name study]

The Dutch hunger winter study

  • Severe malnutrition in Dutch cities late 1944, early -45.
  • Men (and women) born in 1944-1946 monitored throughout life (still ongoing).
  • Men summoned for military service in 1960s; psychiatric evaluation


Antisocial Personality Disorder


yes they are more aggressive
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Besides the Dutch hunger winter study you also have the Barbados study, what were its results

Elementary school children (5-11) suffering from moderate-severe malnutrition during the first year of life (n=129), versus matched healthy controls (n=129)

Malnutrition associated with
  • Lower IQ
  • More attention problems
  • More emotional problems
  • Reduced social skills
Follow-up adolescence
  • Higher level of aggression
  • Persisting attention problems
Follow-up adulthood (40)
  • Lower IQ
  • Less favourable personality traits (anxiety, depression, angry hostility, less self discipline

Results
  • Hardly influence by SES or resolving malnutrition
  • Persisting throughout life

You also have the Mauritius study, what are its results and design?

Study population: toddlers with and without physical signs of malnutrition
Intervention: enrichment with daily healthy meals, small classes, physical exercise

better behaviour when taking the enrichment

Does malnutrition/extreme hunger in adults induce similar effects regarding aggressive behaviour?

The Minesota starvation study (1944-1945)
  • Weight loss >25%
  • Behavioural effects
    • Hysteria
    • Hypochondria
    • Depression
    • Withdrawal, isolation
    • Cognitive deficits
    • Irritatability
    • (auto)aggression


no long term effects

Is malnutrition associated with aggressive behaviour in adults, including violent offending?


Food insecurity - Dutch adult offenders (N=180)
1/5 prisoners were not able to get good and healthy food

What is the nutritional status of offenders?

Prison food (UK, Netherlands)
  • Nutritional value sufficient in most prison systems
  • Low budgets
  • Prisoners don't always finish their plates
  • Prisoners make poor choices
  • Vitamin D3 problematic
  • No fish

What can you say about fish consumption and homicide and hostility (=vijandigheid)?

The more fish is consumed the lower the homicide deaths


more than 1 fish meal a week the lower the Hostility score

Give a summary of the Dutch forensic patients study [levels of nutrients in blood samples]

  • Nutrient levels within reference values
  • Vitamin D3 levels low
  • Cu/Zn ratios high
  • Low omega-3 fa levels
  • Vitamins and minerals not associated with behaviour
  • Several fatty acids associated with behaviour
    • omega-3 is protective

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