Forensic Psychology 🤧 Flashcards
Paper 3
what is the aim of offender profiling?
- to narrow down the list of likely suspects
- generate hypotheses about characteristics of offender
what are the two approaches to offender profiling?
- top down approach (American)
- bottom up approach (UK)
when did the top down approach originate?
- 1970s by FBI
how did top down approach start?
- gathered data from in depth interviews with 36 sexually motivated murderers including Ted Bundy and Charles Manson
- concluded data could be categorised into organised or disorganised crimes
- used to predict characteristics used to find the offender
what are the types of murder most likely to be carried out by an organised offender (top down approach)?
- planned crime
- victim specifically targeted
- leaves few clues
- body transported from scene of crime
what are the types of murder most likely to be carried out by a disorganised offender (top down approach)?
- unplanned crime
- little attempt to hide evidence at crime scene
- random victim
- sexually sadistic acts performed post death
what are the likely characteristics of an organised offender (top down approach)?
- generally high IQ
- socially/ sexually competent
- usually living with a partner
- confident and attractive
what are the likely characteristics of a disorganised offender (top down approach)?
- lives alone near crime scene
- sexually inadequate
- severe forms of mental illness
- confused and distressed
what are the stages of conducting an FBI profile?
- data assimilation
- crime scene classification (organised or disorganised)
- crime reconstruction
- profile generation
what research support is there for distinct organised category of offenders (top down approach)?
- Canter et al conducted analysis of 100 US murders, each committed by a different serial killer
- technique called smallest space analysis was used to assess co-occurrence of 39 aspects of serial killings which matched FBI’s typology (good validity)
what is a counterpoint to the research support for organised category of offenders (top down approach)?
- organised and disorganised types are not mutually exclusive (variety of combinations)
- Godwin argues that it is difficult to classify killers as one or the other
- killer may have multiple contrasting characteristics ie. higher intelligence but commits a spontaneous murder leaving victims body at the crime scene
- organised disorganised typology is more of a continuum
what limitation is there for top down approach for profiling?
flawed evidence on which it is based
- FBI profiling was developed in interviews with 36 murderers in US, 25 were serial killers
- at the end of the process 24 were classified as organised and 12 were disorganised
- Canter argued sample was poor (wasn’t random or large and consisted of very few different kinds of offenders)
- no standard set of questions so each interview was different and therefore not really comparable
- does not have a sound, scientific based
what is another name for the bottom up approach?
- data driven approach!
where is the bottom up approach based?
- UK
according to the bottom up approach, how are profiles created?
- in terms of characteristics, social background and routine behaviour
- through systematic analysis of evidence at the crime scene
what are the two sections of the bottom up approach?
- investigative psychology
- geographical profiling
what is investigative psychology and who was it developed by (bottom up approach)?
- David Canter
- uses psychological theory and statistical procedures to analyse crime scene evidence
- way a criminal behaves during a crime mirrors how they behave normally, so patterns will be revealed about their lifestyle when analysing behaviour during an offence
what is geographical profiling (bottom up approach)?
- concerned with where rather than who
- analyses locations of connected series of crimes and considers where they were committed, spatial relationships between different crime scenes and how they might relate to an offenders place of residence
what are the 3 main parts of investigative psychology (bottom up approach)?
- interpersonal coherence
- forensic awareness
- smallest space analysis
what is interpersonal coherence (bottom up approach)?
- consistent behaviour so links can be made between crimes
what is forensic awareness (bottom up approach)?
- offenders have awareness of police techniques and past experiences of crime
- ie. may cover up fingerprints
what is smallest space analysis (bottom up approach)?
- statistical technique
- uses analysis to find correlating patterns of behaviour
- used by Canter and Salfati (found 3 themes)
what are the 3 themes Canter and Salfati found for smallest space analysis (bottom up approach)?
- instrumental opportunistic
- instrumental cognitive
- expressive impulsive
what does instrumental opportunistic mean when referencing smallest space analysis (bottom up approach)?
- commit a crime to obtain a goal
- relatively easy/ simple
what does instrumental cognitive mean when referencing smallest space analysis (bottom up approach)?
- offender is concerned about detection by police
- planned crime
what does expressive impulsive mean when referencing smallest space analysis (bottom up approach)?
- uncontrolled
- offender has been provoked
what are the 2 main parts of geographical profiling (bottom up approach)?
- circle theory
- criminal geographical targeting
what is the circle theory (bottom up approach)?
- identifies criminals by looking at spatial distribution of crime scenes
- if similar crimes are plotted on a map, and they form a circle, the criminals base would be in the centre of it
- can be marauders (home within geographical area) or commuters (travel)
what is criminal geographical targeting and who developed it (bottom up approach)?
- Rossmo, based on Rossmo’s formula
- produces a 3D map displaying spatial data related to time, distance and movement to and from crime scenes
- map is called a jeopardy surface where different colours indicate closeness to residence
what evaluation is there for the bottom up approach?
is it useful?
- Rossmo claimed that while profiling may not always identify actual offenders its useful in prioritising house to house calls and identifying a geographical area where DNA might be
- doesn’t distinguish between multiple offenders in same area and is limited to spatial behaviour rather than individual characteristics
- Rossmo worked for Canadian police but had to leave after they decided his methods weren’t helpful
what research evaluation is there for bottom up approach?
study of 45 sexual assaults by Canter and Larkin
- support found for distinction between commuters and marauders
- however 91% were marauders (majority) so is it useful if most offenders are marauders anyway
- Petherick pointed out that if an offenders home isn’t at centre of geographical circle, police may look in the wrong area anyway
how can the railway rapists be used to evaluate the bottom up approach?
- success in Canters first profiling case (railway rapists)
- helped police reduce suspect pool and led effective conviction
- surveys of 48 police forces found 75% said profiling was helpful
- only 3% said it had helped identify actual offender
how did the historical approach to explaining offenders behaviour originate?
- Early Greeks were first to link physical form to personality
what type of explanation is the historical approach to explaining offenders behaviour?
- biological approach
NOTE: DIFFERENT FROM BIOLOGICAL APPROACH TO EXPLAINING OFFENDERS BEHAVIOUR
why is the historical approach to explaining offenders behaviours a biological explanation?
- criminals are seen as lacking evolutionary development and their savage temperament would make it difficult for them to live in modern society and would turn to crime
- criminality is a result of their genes and an innate tendency and they were not to blame
what theory is used in the historical approach to explaining offenders behaviour?
- Atavistic form (Lombroso, 1876)
what is atavistic form (historical approach)?
- early biological explanation which proposed criminals are a sub species of genetic throwbacks that cannot conform to rules of modern society
- such individuals are distinguishable by particular facial and cranial characteristics (act as markers for particular crimes)
what does the atavistic form theory suggest about the facial/ cranial characteristics of criminals (historical approach)?
- strong prominent jaw
- high cheekbones
what does the atavistic form theory suggest about the facial/ cranial characteristics of muderers (historical approach)?
- blood shot eyes
- long ears
what does the atavistic form theory suggest about the facial/ cranial characteristics of sexual deviants (historical approach)?
- glinting eyes
- swollen fleshy lips
what does the atavistic form theory suggest about the facial/ cranial characteristics of fraudsters (historical approach)?
- thin and reedy lips
what empirical research did Lombroso carry out, in relation to atavistic form theory (historical approach)?
- systematically examined facial and cranial characteristics of convicts (3839 alive and 383 dead)
- concluded that there is Atavistic form
- found 40% of crime was committed by those with atavistic characteristics
how does the historical approach also link to environmental influences to explaining offenders behaviour?
- atavistic form interacted with a persons physical and social environment (nature and nurture)
- 3 categories of criminals
what are the 3 categories of criminals linking to environmental and biological influences to explaining offenders behaviour (historical approach)?
- born criminals
- insane criminals
- criminaloids
what are born criminal characteristics (historical approach)?
- atavistic form
what are insane criminal characteristics (historical approach)?
- suffering from a mental illness
what are criminaloids characteristics (historical approach)?
- innate characteristics predisposes them to criminal behaviour under the right circumstances
what else does the historical approach cover in reference to criminal types?
- somatotypes (body types)
- by Kretschmer (studied 4000 criminals)
what are the four somatotypes explained by the historical approach?
- leptosome
- athletic
- pyknic
- dysplastic
what is leptosome body type and how does it link to offending behaviour (historical approach)?
- tall and thin
- petty thieves
what is athletic body type and how does it link to offending behaviour (historical approach)?
- tall and muscular
- violent crimes
what is pyknic body type and how does it link to offending behaviour (historical approach)?
- short and fat
- crimes of deception and violent
what is dysplastic body type and how does it link to offending behaviour (historical approach)?
- mixed
- more than one type of crime or crimes against morality (ie. prostitution)
what is a limitation of the research into historical approach to explaining offending behaviour?
methodological issues with Lombroso’s research
- lack of control group
- Goring did use a control group in a similar study and found little differences in facial features although offenders tended to be of slightly smaller build than non offenders
- failed to account for other variables such as psychological disorders
- issue of causation
- didn’t study females, reflecting the views at the time that females were less intelligent than men and that those who committed crimes had masculine traits
how was Lombroso’s research criticised, apart from methodological issues (historical approach)?
- accused of scientific racism
- linked to Eugenics movement (Galton, 1880’s)
- influenced by Darwin and survival of genetically fit theory
- suggested desirable traits inherited (ie. intelligence) and these groups should breed for the good of society as they have a genetic advantage and others should not
what support is there for the historical approach?
contribution to science of criminal psychology
- shifted emphasis away from moralistic discourse towards a more scientific realm
- prior, criminals were assumed to have free will which could be deterred if punished
- laid foundation of offender profiling by trying to explain how particular types of people are likely to commit particular crimes
- evidence based, raised possibility that criminal mind could be studied scientifically
what are the two main biological explanations to offending?
- genetics
- neural
what sections does genetics cover when explaining offender behaviour (biological approach)?
- twin and adoption studies
- candidate genes (MAOA and CDH13)
- diathesis stress model
what sections does neural cover when explaining offending behaviour (biological approach)?
- regions of the brain (prefrontal cortex and limbic system)
- neurotransmitters (serotonin and noradrenaline)
how does genetics explain offending behaviour (biological approach)?
- suggests that would-be offenders inherit a gene, or combination of genes, that predispose them them to commit crimes
what twin study did Karl Christiansen carry out for genetic explanations (biological approach)?
- studied over 3500 twins in Denmark
- found concordance rates for offender behaviour of 35% for MZ male twins and 13% for DZ male twins
- offender behaviour was checked against Danish police records
- data indicates that it is not jus the behaviour that might be inherited but underlying predisposing traits
what adoption study was carry out by Raymond Crowe for genetic explanations (biological approach)?
- found adopted children whose biological mother had a criminal record had a 50% risk of having a criminal record by age 18
- whereas adopted children whose biological mother didn’t have a criminal record only had a 5% risk
who carried out the study on candidate genes for genetic explanations (biological approach)?
- Tiihonen et al
what was Tiihonen et al’s study on candidate genes (biological approach)?
- genetic analysis of 800 Finnish offenders
- suggested two genes (MAOA and CDH13) may be associated with violent crimes
- 5-10% of all severe violent crime in Finland is attributed to MAOA and CDH13 genotypes
what are the two candidate genes linked to (biological approach)?
- MAOA gene regulates serotonin and low levels is linked to aggressive behaviour
- CDH13 gene is linked to substance abuse and ADHD
how does the diathesis stress model link to genetic explanations of offending (biological approach)?
- genetic influence is at least partly moderated by environmental effects
- tendency towards offending behaviour may come about through a combination of genetic predisposition and a biological/psychological trigger
- ie. being raised in a dysfunctional environment or having criminal role models
how does neural explain offending behaviour (biological approach)?
- neural differences in brains of offenders and non offenders
where has a lot of the evidence for neural differences in offenders and non offenders come from (biological approach)?
- involved individuals diagnosed with antisocial personality disorder (APD)
- associated with reduced emotional responses, lack of empathy for others feelings
- condition that characterises many convicted offenders
what were the two brain regions relating to offending behaviour according to neural explanations (biological approach)?
- prefrontal cortex
- limbic system
who studied the role of the prefrontal cortex in offending behaviour and how (biological approach)?
- Adrian Raine
- conducted many studies of ADP brain, reporting several dozen (71) brain imaging studies showing that murderers, psychopaths and violent individuals have reduced functioning in prefrontal cortex (regulates emotional behaviour)
- lowered activity in this area is associated with impulsiveness and loss of control
who studied the role of the limbic system in offending behaviour and how (biological approach)?
- Raine
- studied murderers who were found not guilty by reason of insanity
- found, compared to controls, abnormal asymmetries in limbic system, especially the amygdala
- reduced activity on the left and increased activity on the right
what are the two neurotransmitters associated with offending behaviour (biological approach)?
- serotonin
- noradrenaline
how does serotonin link to offending behaviour according to neural explanations (biological approach)?
- researchers suggest low levels of serotonin may predispose individuals to impulsive aggression and criminal behaviour
- low levels means a lack of inhibition by prefrontal cortex of impulsive aggressive urges
- dopamine hyperactivity may enhance this effect
how does noradrenaline link to offending behaviour according to neural explanations (biological approach)?
- both very high and very low levels of noradrenaline have been associated with aggression, violence and criminality (Wright et al)
- high levels are associated with the sympathetic nervous system and fight or flight response, and this is linked to aggression
what research support is there from adoption studies for genetic explanations of offending behaviour (biological approach)?
- Crowe found adopted children who had a biological parent with a criminal record had a 50% greater risk of having a criminal record by the age of 18, whereas adopted children whose mother didn’t have a criminal record only had a 5% risk (also AO1)
- Medrick et al’s study of 14000 adoptees found 15% of sons adopted by a criminal family went on to be criminals compared to 20% whose biological mothers’ parents were criminal
- findings suggest inherited genes are a marginally more significant factor than environmental influences
how are genetic explanations to explain offending behaviour criticised (biological approach)?
- questions about deterministic explanations
- can be argued inherited genes will determine later behaviour
- Tiihonen et al suggest those with defective gene were 13 times more likely to have a history of repeated violent behaviour, but this means that not everyone with this gene had to become an offender
- law questions whether the cause of behaviour is outside a person’s control and it does appear men find it harder to avoid criminal behaviour than women
- therefore a determinist view of criminal behaviour cannot be totally ruled out, though elements of free will need to be considered too
how do neural explanations to explaining offending behaviour have real world application/ support (biological approach)?
- leads to possible methods of treatment
- eg. if serotonin levels are related to increasing aggressiveness in criminals, then people in prison could be given diets that enhance serotonin levels and hopefully decrease their aggression
- artificial sweetners are also high in phenylalanine and low in tryprophan, both of which make the production of serotonin difficult
- suggests drugs and changes in diet could be used to help some individuals
how can neural explanations be evaluated in terms of issues of validity (biological approach)?
- based on research related to aggression rather than offending
- studies in this area often use non human animals (Curran and Renzetti, 2001)
- undermines potential relvance of such information for understanding offending behaviour
- also, as with genetic evidence, there is not 100% correspondence with any area of the brain or neurotransmitters
- data cannot be used to predict who might become an offender or can it be generalised to non violent crimes