2.1 Flashcards
what are biological theories
they relate to dna/physical factors leading to criminality
what is the xyy theory
jacobs theory that an extra y chromosome leads to criminality
what is the xyy study
studied inmates and found that 9/315 suffered from it. 15/1000 in prison vs 1/1000 in public
who is a real life case of xyy
john wayne gacy aka killer clown. he abused and killed 33 men and was known for sexually abusing young boys
what is the twin studies theory
identical twins are more likely to commit crimes compared to non identical
what is the concordance rate for monozygotic twins/dizygotic twins
52%/22%
what is the adoption study theory
adoptees share environment with adoptive parents and genes with genetic parents. if they are more like genetic parents then its biological
what is the concordance rate for birth parents/adoptive parents
20%/15%
what is lombrosos theory of born criminals
criminals are all similar physically
what are the features of criminals
long jaw,large/small ears,full lips,beak nose
what is sheldons theory
body type has an effect on criminality
what are the 3 body types sheldon found
mesomorph(muscular/aggressive),ectomorph (thin/fragile),endomorph(fat/soft)
which body type is more likely to become criminal
mesomorph
what is the brain abnormality theory
damage to brain can alter personality eg.phineas cage
what is the neurochemical theory
some chemicals can lead to criminality
