unit 3 Flashcards
(47 cards)
What are the 7 types of crime
- Property predatory crime
- Property fraudulent crime.
- Interpersonal violence general.
- Interpersonal violence sexual.
- Transactional vice.
- Order disruption.
- Folk/Mundane crime.
Characteristics of criminal behaviour
The specific characteristics difficult to define, since there’s diff types of crime which are bound to laws of each society and laws can change. One thing in common is that the behaviour has a detrimental or harmful effect on a victim, and the person committing the crime knows that what they are doing is wrong or illegal.
Adrian Raine (1993) twin study
52% concordance for MZ twins and 21% in DZ twins for their delinquent behaviour.
What genes are linked to criminal behaviour?
MAOA and CDH13
Brunner et al (1993) study
Analysed DNA of 28 male members of aggressive Dutch family and found that they all shared a particular gene leading to low MAOA.
Diathesis stress model of inherited criminality
Epigenetics proposes that genes are switched on and off by epigenomes which have been affected by environmental factors.
What’s one possibility of epigenomes being switched on
Maltreatment in childhood.
Caspi et al (2002)
Used data from longitudinal study that has followed around 1000 people from babies. Assessed antisocial behaviour at 26 and 12% of low MAOA had experienced maltreatment and were responsible for 44% violent convictions.
Raine (2004) brain study
Cites 71 brain imaging studies showing that violent people have less functioning in the prefrontal cortex which regulates emotion and behaviour.
What is the amygdala
A structure of the brain made of grey matter, located in the medical temporal lobe and part of the limbic system
James Papez (amygdala)
Implicated amygdala in behaviour. Connected as it’s neurally linked to the hypothalamus, hippocampus and prefrontal cortex so has a large influence on brain functioning and behaviours like emotion and social interaction. Plays a role in how we respond to threats.
Coccaro et al (amygdala)
Investigated effects of amygdala on aggression by studying people with Intermittent Explosive Disorder. Reviewed faces at the same time as fMRI scan and IED group showed high levels of amygdala activity when viewing angry faces.
Amygdala and fear conditioning
Children learn to inhibit aggressive/antisocial behaviours with fear conditioning and the amygdala is involved. If amygdala is dysfunctional they won’t identify social cues that indicate threat so seem fearless.
Longitudinal study (fear conditioning)
1795 participants tested for fear conditioning at age 3 by measuring physiological arousal in response to painful noise. Those who committed crimes at 23 showed no fear conditioning at 3 years
Link between personality and criminal behaviour
Can be explained in terms of arousal - extroverts seek more arousal so engage in dangerous activities. Neurotics are unstable so overreact in threat. Psychoticism lack empathy. People high in these less easily conditioned.
Eysenck’s criminal personality
General theory of personality based on idea that character traits tend to cluster along 3 dimensions; extroversion, neuroticism and psychoticism
Biological basis for criminal behaviour personality
Suggested each trait has a biological basis which is innate (comes from genetics). 67% of the variance for the traits is due to genetic factors
Biological basis for extroversion
Determined by the overall level of arousal in a person’s nervous system. Extroverts under aroused so need more stimulation
Biological basis for neuroticism
Determined by the level of stability in the sympathetic nervous system. Unstable and easily get upset
Biological basis for psychoticism
Has been related to higher levels of testosterone so men more likely.
Cognitive distortion
Form of irrational thinking. Ways that reality has become twisted so what is perceived no longer represents what’s true.
2 examples of cognitive distortion
Hostile attribution bias and minimalization
What is a hostile attribution bias?
Someone always thinks the worst.
What is minimalization
An offender may reduce negative interpretation of their behaviour which helps them accedpt the consequences and feel less empathy.