area 1- forensic Flashcards
what are the 4 physiological explanations of what makes a criminal
Lombroso
Sheldon
Brunner
choy
what did Lombroso believe makes a criminal and what did he do/find
facial structure
first to study crime scientifically
looked at skulls of 4000 prisoners -400 dead ones ( no comparison- science?)
criminals- strong cheek bones, prominent jaw line, asymmetrical faces
atavist theory= criminals are sub-type of genetic throwbacks that cannot conform to modern day rules so are distinguishable by particular facial characteristics ( genetics- born with it from evolution)
what did Sheldon believe makes a criminal and what did he do/find
body type
mesomorph-muscular, little fat= traits such as assertive, attention seeking, adventurous
ectomorph- little fat, not muscular= traits such as self conscious, thoughtful, fragile
endomorph- fat, round= traits like sociable, relaxed, comfortable
Sheldon believed that mesomorphs are more likely to commit crime as they are risk taking and domineering
He studied photographs of the physical proportions of 4000 men and compared them to a sample of photographs of college students and delinquents rating them on a scale of 1 – 7 (high) for their resemblance to mesomorph. Delinquents had a higher mesomorph rating.
what did Brunner believe that makes a criminal and what did he do/find
media twisted what Brunner said that their is association between genes and aggressive behaviour that their is a gene for crime that was known as warrior gene.
The ‘warrior’ gene is MAOA which is responsible for enzyme monoamine oxidase-A which breaks down excess serotonin
he began research as a doctor in Netherlands with a number of males who suffered from mental retardation- leading to aggressive behaviour and concluded their carry mutation in x chromosome
became known as Brunner syndrome - case study 5 males took urine sample found lack of MAOA resulting in high serotonin levels which made them aggressive
what is the summarised version of brunners findings and
he believed their was genes associated with aggressive behaviour- media twisted this to their is a warrior gene
after doing case study on 5 males and took urine samples they found lack of MAOA is a genetic mutation which lead to high levels of serotonin leading to aggressive behaviour
what did choy believe makes a criminal and what did he do/find
heart rates
low heart rate has relationship between gender and crime
894 children who are 11 - took sample from meningitis health project
data from self-report and official conviction list from convictions up to age of 23
low resting heart rate can predict low criminal behaviour
what are the two non-psychological explanations
Farrington
Sutherland
Kohlberg
what did Farrington believe makes a criminal and what did he do/find
family life influences criminal behaviour
sample of 411 males, interviewed from 8 to 48 (longitudinal) who were all from the same class
details of aggressive behaviour from teachers, criminal records , self-report and interviews with family= holistic, high construct validity
family link-loss of mother caused delinquent behaviour
what did Sutherland believe makes a criminal and what did he do/find
differential association theory= learned through interactions with others
gain social norms of criminal groups e.g. friends/family attitudes and motives e.g family hating police
how frequent the interaction is with criminal attitudes e.g. how long the parents have hated police
what does Kohlberg believe makes criminal and what did he do/find
pre-conventional= stage 2- doing behaviour to benefit themselves e.g. avoid punishment
conventional= stage 3- doing behaviour to benefit others and society
delinquent group showed less mature reasoning so adult criminals may be stuck in pre-conventional stage.
what is the amygdala responsible for
fight or flight response- emotion
overactive- aggression, impulsive
reduced- cold, calculating
what is the hippocampus responsible for
metabolic rate- high in murderers
damage- impulsive, unplanned
what is the thalamus responsible for
evolutionary emotional responses- damage linked to combativeness
what is the corpus collosum responsible for
communications between hemispheres- opposite sides- makes sense of situation
what is the prefrontal cortex responsible for
decision making, impulsiveness
damage- less self control, understanding consequence