Forensic Psychology Flashcards
What is crime
Any act that violates the law and is punished by the state
What factors influence our definition of crimes
History
Age
Culture
Mental state
Describe how culture influences crime
Criminal behaviour varies from country to country as a result of different laws in those countries
Ie U.K. Alcohol can be purchased from 18 in America 21
State 3 ways of measuring crime
Victim surveys
Official statistics
Offender surveys
What are official statistics
They are annual statistics on crime and the info is based on info that’s seen or reported to the police e
What are victim surveys
This is when a sample of people are asked to state which crimes may have been reported or not have been committed against them over a fixed period time
How are victims surveys conducted
A sample is selected from a list of addresses from the Royal Mail and it’s done randomly
Everyone is interviews using a fixed set of questions
What are offender surveys
This is when offenders are questioned with the aim to increase knowledge of crime behaviour and young people
Give one strength and one weakness of official statistics
Weakness: only a certain number of crimes get report d to the police for reasons like they believe it won’t be taken seriously, 42%
It means official stats only represent a small part of criminal activity due to the dark figure of crime
Strengths general trends in statistics tend to be in agreement meaning areas are used high crime rates can be targeted
Describe strengths of victim surveys
It provides potential info on the dark figure of unreported crime depends on honesty
They are more consistent than official statistics when making comparisons over a time period as official cary with changes in law
Describe limitations of victim surveys
The sampling is biased as only 75% of those concreted take part ie they have time,also the sample is done from those with a postal address
Victims surveys potentiall underestimate the actual crime,as the number of crimes reported from an indivisible is 5 meaning people could have more incidents that happen against them in a year which won’t get reported
Ie Farrell and pease in domestic abuse suggests that as a result of the cap as man 3 mill in cases haven’t been included in crime figures
State limitations of offender surveys
Lack of accuracy in answer we in these surveys people may underplay their involvement in crime social desirability
What is meant by offender profiling
It’s a method of working out the characterises of an offender by examining the characterises of the crime and crime
What is the top down approach
It’s designed to produce a profile of the most likely offender through analysis of the crime scene
State the six main stages of the top down approach
Profiling inputs
Descion process models
Crime assessment
Criminal profile
Crime assessment
Apprehension
What happens in profiling inputs first stage
Information is collected about the crime scene ie photographs,sketches
Background info on the victim is collected ie employment
Details of the crime itself such as weapon, autopsy report
What happens in decision process models
The data received is put into meaningful patterns
Ie the type of murder
Time factors where it occurred during night or day
Location where was the crime scene located
What is crime assessment third stage
The offender based in the evidence from the crime is classified as either organised or disorganised
State characteristics of both organised and disorganised criminals
Organised: high IQ
Socially competent
Murder was premeditated,lack of clues at crime scene
Happy harmonious relationship
Disorganised:low IQ
Crime is unplanned with victim selected randomly
Crime contains lots of clues
Likely to live alone
What happens in the criminal profile stage
A profile of the offender is constructed and it includes a hypothesis about their habits,likely behaviours
What happens in crime assessment stage 5
A written report is given to the police and people matching profile are evaluated
What happens in stage 6 apprehension
A suspect is arrears and each stage or the process is evaluated to check if the conclusions made are valid and legitimate
Give 4 evaluation points from the top down approach
The method is deemed useful,copson and schereer and Jarvis
Only applies to specific crimes
David canter -flawed classification
Alison based in outdated models of personality
Explain how research has shown the effectiveness of the top down approach
(Ao3
Cops on found 82% of 184 us police officers found the method useful and that 90 said they would use it again
Schereer and Jarvis stated that enables police officers to keep an open mind and that as a result it helps in prevent wrongful convoy
Shows how the technique has been applied to real life by the police and that it’s proving to be beneficial for them
Explain how it’s a weakness of the top down approach that it’s only useful for specfic crimes
Research has shown that the approach is only useful when crime scene reveal crucial details about the suspect like in rape and murder cases
It’s not useful in common offences like robbery when the crime scene dosent really reveal much about the offender
It’s a limitation as it shows the approach can’t be applied to all crimes so can’t be deemed as useful
Explain how the top down approach is based on outdated models of personality and how is it a weakness
The model is criticised for being naive and based on outdated models of personality that believe that offenders motivations and patterns of behaviour are consistent across all contexts rather than not being changed by external factors
Weakness as it shows the approach ie limited in the sense that it’s going to have poor validity and readability when trying to identify suspects and predicting their next moves
Describe David canters research and how it’s a weakness of the top down approach
They studied 100 US murders and cross referenced them with 39 characterises associated with disorganised and organised criminals
They found evidence for organised but not disorganised
It’s contrasted the two categories that criminals go into meaning the classification is invalid
What is the bottom up approach
It uses statistical techniques in order to produce predictions about likely characterises of an offender
State two key aspects of the bottom up approach
Geographical profiling
Investigative psychology
State the 3 main parts of investigative psychology
Interpersonal coherence
Forensic awareness
Smallest space analysis
What Is meant by interpersonal coherence
It’s that their are links with how the offender behaves with the victim and how they behave in real life
Ie may be aggressive in real life
What is meant by forensic awareness
It’s that the criminal may do certain techniques that shows they are aware of police techniques
Ie burning body,getting rid of evidence
What is is smallest space analysis and state the themes
3 main themes have been identified about crime scene
Instrumental opportunistic-this is that murder is used to obtain something or accomplish a goal
Instrumental cognitive-the crimes are more planned due to fear of being detected
Expressive impulsive-the offender feels provoked so lashes out in the heat of strong emotions
What is geographical profiling
Using patterns shown by the locations of crimes to identify if they may relate to the offenders place of residence
What is the circle theory
It states offenders have a spatial mindset and so commit crimes in an imagined circle
In accordance to geo profiling state the two types of offenders
A marauder- an offender whose place of residence is within the geographical area in which the crimes are committed
A commuter the offender goes to other geographical locations and commits crimes within a defund space in that area
Give 4 evaluation points for the bottom up approach
Use of scientific method
Research support for investigative psychology
Limitations of circle theory
Weakness it geo profiling
How is the bottom up approach deemed scientific and how is this a strength
This is due to the fact it uses objective techniques and computer analysis which makes it more scientific then top down
It’s a strength as by using statical techniques and computer analysis it generates more realisable and valid data
Describe research support for investigative psychology and how it’s a strength of bottom up approach
Copson surveyed 48 U.K. Police officers using investigative psychology and found 75% or the police offer questioned found the advice given to them was useful and that they would do it again
It’s a strength or the bottom up approach as it shows how it’s being used in a real life setting end that it’s bring about a positive response
Describe limitations of the circle theory and how it’s a limitation of the bottom up approach
Although canter and Larkin could distinguish between marauders and commuters they found 91 percent were classified as marauders showing the classification isn’t useful
Petherick found other flaws in the theory for example of the home base of the offender isnt in the centre of the circle then it can mislead the police In looking in the wrong places further more it’s deemed to simplistic to represent ranges as circle
Highlights various flaws in the circle theory and it’s not particularly reliable in the profiling of an offender
Describe the limitations of geo profiling and how it’s weakness
It can’t distinguish between multiple offenders in and area,it’s only limited to spatial behaviour and it doesn’t tell us critical things like the characteristics of the offender
Limitations as it highlights how unrealiable the techniques used are and that it’s not feasible for the police to use these methods
What is the atavistic form
It’s that certain people are born with a criminal personality and it’s innate and that criminals are genetically different and are maladjusted to society so they turn to crime
What are general features of criminals in accordance to the atavistic form
Eye defects
Ears unusual size
Asymmetry of face
Twisted nose
What are lombroso studies humans called
Anthropmeteryb
What was the procedure and findings of Lombardo study
They studies faces of humans and dead faces
They studied 383 convicted Italian criminals he found 43% had at least 5 atavistic form and 22% had just one trait
State 4 somatotypes
And their definitions
Leptosome- tall and thin petty thieves
Athletic-muscular and tall crimes of violence
Pyknic-fat and short,commit crimes of deception
Dysplastic- more than one somatotype crimes against morality
Give 4 evaluation points for the atavistic form
Contribution to science of criminology
Gender bias
Cristina of lombroso methonds
Scientific rascim
Explain how Lombrasos use of empirical evidence is a strength of the atavistic form
He felt that when investigating crimes an evidence based approach was needed
His ideas were based on detailed measurements and empirical observation
Strength as he is considered to be the founder of modern criminology and his use of science made it more acceptable as a science
Explain Criticisms of lombroso methods as an evaluation point
His research had several flaws for example their behaviour was a lack of adequate controls
When he studies prisoners he didn’t pay attention to non prisoners as he did prisoners (if he had he would have found they had similar characteristics)
Charles goring found after comparing 3000 convicts with a group of non convicts he found that no difference expect they were smaller
Limitation as it shows the conclusions reached when defining criminals weren’t valid
Explain how lombroso research were gender biased
He stated that women were less evolved than man,naturally jealous,insensitive to pain and had low intelligence,passive and had maternal instinct and that these neutralis e one another and meant they were less likely to be criminals
Weakness as it shows his approach is largely androcentric,meaning he undermined females
Explain how scientific rascism was an issue with lombroso study
Matt delisi drew attention to the racial undertones of the atavistic theory
Many of the atavistic features that were identified like dark skin,curly hair,fleshy lips were most likely to be found among those of African descent
It’s a limitation as it shows it’s a very controversial aspect of his legacy and approach and in some communities can lead to stereotyping those of African descent
What are the two biological explanations to offending behaviour
Genetic explanations
Neural explanations
What do genetic explanations say causes offending behaviour and state the two candidate genes believed to be responsible for offending behaviour
That an individual genetic make up is the cause of their behaviour
MAOA
Cadherin 13
Describe the research that shows the role of MAOA in offending behaviour
AO1
HanBrunner conducted research on 28 male members of a Dutch family who had history of impulsive and violence
They analysed the DNA of these men and found they shared a gene that lead to low levels of MAOA
Describe research that shows the role of CDH13
Tihonen et al 2015 studied 900 offenders and found evidence of low activity of the MAOA and the CDH13 gene and they found that 5-10% of all violent crimes in Finland were due to abnormalities in one of these genes
What is diathesis stress and epigentics and give state the findings of research that supports this
Materials in the body that switch genes off or on this affected by the environment
Capsi et al in New Zealand they followed 1000 people
They assessed anti social behaviour at the age of 26 and found 12% of men with low MAOA genes had experienced maltreatment when they were babies and were responsible for 44% or violent convictions,shows the environment they were in caused the inactive gene to be expressed resulting in their behaviour
Shows their environments caused the inactive gene to be expressed
What do neural explanations state is the cause offending behaviour
This explanation states that criminals have differences in neurotransmitter levels and differences in brain structure
State the findings of research that shows abnormalities in brain structure
Raine found from brain imaging studies that in murderers and psychopaths there was reduced functioning in the prefrontal cortex and that lowered activity is associated with loss of control and impulsiveness
What is the limbic system and what has research shown about its relation to offending
It’s subcortical structures like the thalamus and amygdala which are linked with emotion and motivation
Raine compared murderers who were not guilty due to insanity with a control group in murderers they found asymmetries in the limbic system were found especially in the amygdala where reduced activity was found in the left and increased on the right
Describe what research has shown about neurotransmitters in relation to offending behaviour
Seo et al found low levels of the neurotransmitter serotonin could predispose individuals to impulsive aggression and criminal behaviour
Noradrenaline both very high and low levels of this have been associated with aggression,violence and criminality (wright et al)
Give 4 evaluation points for biological explanations of offending behaviour
Research adoptions crowe
Rwa application for neural abnormalities
It’s based on research that’s related to agresssion rather than offending
Reductionist