Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
3 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
XYY theory |
Extra Y chromosome makes individuals more aggressive leading to more crime Supermales are more aggressive and violent Jacob et Al (1965) 15 per 1000 in prison and 1 per 1000 in society as a whole Serial Killer John Wayne Gacy had XXY. He committed violent crimes against 33 men |
Jacob et Al 1965 study John Wayne Gacy |
|
|
Twin studies |
Monozygotic and Dizygotic 100% DNA and 50% DNA Concordance rate is higher in Mz twins than it is Dz twins possibly proving that nature has a role to play in criminality Johannes Lange (1929) 10/13 Mz twins had served time in prison Vs 2/17 Dz twins Christiansen (1977) study of 3586 twins. Concordance rate of 35% for Mz male twins and 13% for Dz male twins. 21% for Mz female twins and 8% for Dz female twins |
Johannes Lange (1929) Christiansen (1977) |
|
|
Adoption studies |
Comparing criminal behaviour from both biological parents and adoptive parents Impact of nurture Vs nature on criminality Studies children raised by non biological parents Hutchings and Mednick (1975) 14000 adopted children high proportion of boys with criminal convictions had biological parents with criminal convictions too. Mednick et Al (1994) found no relationship between number of criminal convictions of adoptive parents and adoptive children but significant correlation between biological parents and offspring |
Hutchings and Mednick (1975) Mednick et Al (1994) |
