forensic psychology Flashcards
what did Lombroso suggest criminals were?
genetic throwbacks
what did Lombroso say offenders were seen as?
lacking evolutionary development. their savage and untamed ature made it impossible to adjust to the demands of society
how could these throwbacks be identified?
by physiological markers
how did Lombroso research the throwbacks?
by examining the facial and cranial features of hundreds of Italian convicts
how many covicts did Lombroso examine?
383 dead criminals and 3839 alive criminals
what was the basic argument of eugenics?
that not all people were born equal. Those groups with a genetic advantage should be allowed to breed for the good of society , whilst those without should be eliminated
what is the advantages of atavistic theory (Lombroso’s theory)?
Is credited as shifting the emphasis in crime research away from a moralistic discourse towards a more scientific and credible realm
what are the disadvantages of atavistic theory (Lombroso’s theory?
Could be seen as a racist theory because atavistic traits were similar to those who are non european DeLisi 2012 specific to people of African descent
Goring 1913 after comparing 3000 criminals with 3000 non criminals, concluded that there is no evidence of facial characteristics being distinct to criminal groups. He did uphold the view that criminals generally have a below average intelligence level
Causation is an issue because atavistic form didn’t necessarily cause something but it only correlates. Other factors weren’t considered
what do genetic explanations propose?
that offending behaviour is inherited as one or more genes predispose people to commit crimes
what do neural explanations of criminality focus on?
on areas of the brain and nervous system, and the brain structure.
what twin studies focus on criminality?
Lange’s study
Christiansen’s study
what happened in Lange’s study?
Looked at 13 MZ twins and 17 DZ twins where one of the twins in each pair had served time in prison
Found that 10 MZ twins but only 2 DZ twins had a co twin who was also in prison and concluded that genetic factors must play a predominant part in offending behaviour
what happened in Christiansen’s study?
Studied 87 MZ and 147 pairs and found a concordance rate of 33% for MZ and 12 for DZ
what was Tiihonen’s study and what did it find?
genetic analysis of around 900 finnish offenders
found a abnormality in the MAOA gene and the CDH13 gene
what is the MAOA gene?
a gene that controls dopamine and serotonin in the brain and linked to aggressive behaviour
what is the CDH13 gene?
a gene that has been linked to substance abuse and ADD
what does the diathesis stress model state?
A tendency towards criminal behaviour is likely to come about via the combination of a genetic predisposition and environmental trigger
what is antisocial personality disorder(APD) associated with?
reduced emotional responses, a lack of empathy for the feeling of others, and is a condition that characterises many convicted criminals.
what did the research by Adrian Raine find?
individuals with APD had reduced activity in the PFC (prefrontal cortext) which regulates emotional control.
found an 11% reduction in the volume of grey matter in the PFC of people with APD compared to control group.
what did Keyser et al find?
found that when criminals were asked to empathise with a person depicted on film as experiencing pain did their empathy reaction (control by mirror neurons in the brain) activate.
what does findings by Keyser et al suggest?
This suggests that individuals with APD are not totally without empathy but may have a neural switch that can be turned on and off, unlike the “normal” brain that has the empathy switch permanently on.
what is the evaluation for genetic and neural explanations to crime?
Cause and effect cannot be established in any human studies all rely on correlation to other
Many studies link genes with anti-social personality disorder and/or substance abuse but not necessarily with offending
Biological determinism erasing implications of accepting that offending is due to biological function
Reductionism need to look at wide factors such as social context,substance abuse, mental illness, upbringing
Comparison with social psychological explanation eg social learning theory limited by other explanations.
Research support twin studies and studies of candidate genes.
Is scientific
what are the cognitive explanations of criminality
Kohlberg’s morality theory
minimalisation
cognitive distortions
what is Kohlberg’s morality theory
argues that there are 3 levels of morality
preconventional
conventional
post conventional