P3: Forensic Psychology Flashcards
What is offender profiling/criminal profiling
Behavioural and analytical tool aimed to predict and profile characteristics of criminals
What is the Top-down approach/topology approach
(American) Working down to matching evidence to a pre-existing template. Classifies murderers or rapists into 2 categories (Organised or disorganised)
What idea is organised and disorganised distinction is based on
Having a signature ‘way of working’(Modus operandi) that correlates to a particular set of psychological and social characteristics
What are characteristics of an organised offender
Evidence of planning, High levels of control, Above-average IQ, usually married(sexually competent), have a ‘type’ they target
What are characteristics of a disorganised offender
Little evidence of planning, little control, below-average IQ unemployed,history of failed relationships, Shows signs of a spontaneous act
What are the four main stages in constructing an FBI profile
- Data assimilation(profilers reviews the evidence)
- Crime scene classification(organised or disorganised)
- Crime reconstruction(hypothesis of sequence of events…)
- Profile generation(hypothesis related to the likely offender)
A03: Top-down application
Limitation: common offences do not lend themselves well, best suited for big crimes scenes that reveal important details about the suspect.
A03: Top-down modelling based on
Limitation: based on outdated models of personality, assumes offenders have a consistent motivation and behaviour. No external factors considered(e.g.situation) ∴ poor validity when trying to predict offenders next move
A03: Top-down evidence of categories
Limitation: Little support for ‘disorganised offender’ from data analysed using ‘small space technique’.Findings found evidence of organised but not disorganised offenders ∴ undermines the whole system.
A03: Top-down complexity/simplicity
Limitation: Too simplistic, suggested we focus on motivation of killers not type because behaviours of organised and disorganised are not mutually exclusive therefore has prompted researchers to propose more detailed topological models
A03: Top-down original sample
Limitation: original sample only interviewed 36 killers, therefore is unrepresentative. Also it is not appropriate to rely on self-report data with convicted killers when constructing a classification system
What is the bottom-up approach
(British)Working up from evidence collected at the crime scene and then developing a hypothesis about their motivations, characteristics(Data driven)
What is investigative psychology
A type of bottom-up profiling that matches details of crime scenes to a statistical database in order to apply psychological theories, which allow you to predict the next offence
State and explain the central concept of investigative psychology
Interpersonal coherence- The idea that the way an offender behaves at the crime scene may reflect behaviour in everyday situations
What is forensic awareness
Individuals who have been subjected to police interrogation in the past which makes them mindful about ‘covering their tracks’
What is geological profiling
A type of bottom-up profiling based on the principle of spatial consistency, that an offenders base of operations can be revealed by the location of their previous crimes
What is crime mapping
Information from the location of linked crime scenes which allows informed decisions about their base of operation and modus operandi
Define jeopardy surface
An educated guess on where the offender will strike next
What is the difference between a Marauder and commuter
Marauder- Operates in close proximity to their home base
commuter- Travelled a distance away from their usual residence
What is circle theory and how does it help
A circle created around their usual residence from a series of offending.Their ‘spatial decision making’ can provide insight into the nature of the offence
A03: bottom-up evidence
Strength: Using small space analysis on 66 sexual assault cases, a correlation was found across patterns of behaviour which were deemed common. Can lead to an understanding of how behaviour may changes with offences, showing how statistical techniques can be applied
A03: bottom-up geographical profiling
Strength: Information collected from 120 (serial)murder cases showed the location of body disposal were in difference sites, but created a centre of gravity around their base.(Done using small space analysis), therefore spatial info can be a key factor in locating the base of an offender
A03: bottom-up The basis(foundation)
Strength: Has a scientific basis, is more objective n scientific than the top down(e.g.less speculation), Geographical,biographical and psychological data can assist. Therefore approach has many utilities which can aid with all aspects of the judicial process
A03: bottom-up application
Strength: (application)Can be applied to a wide range of offences e.g. small space analysis can be used for theft …to rape and murder
A03: bottom-up profiling results
Limitation: mixed results for profiling as there has been a significant of failures in the past.A study surveyed 48 police forces and found roughly 83% of info provided by profiler is considered ‘useful’, but only 3% leads to accurate identification of offender
What did the atavistic form propose
Lombroso’s historical approach laid foundation of profiling. As he suggested that criminals were ‘genetic throwbacks’(primitive sub-species) biologically different from non criminals
How did Lombroso view criminals
Lacking evolutionary development , savage and untamed nature = impossible to adapt to a civilised society there would turn to crime.
(Innate tendency and suggested it’s not the criminals fault)
What are some Atavistic characteristic both physical and emotions
Physical - narrow, slipping brow
- strong prominent jaw
- high cheekbones
- facial asymmetry
- extra toe, nipples, fingers
- dark skin
Emotional - insensitivity to pain
- criminal slang
- tattoos
- unemployment
What are some ‘markers’/traits of a murder according to the atavistic form
bloodshot eyes,curly hair, long ears
Detail Lombroso’s research he did for the atavistic form
Examined facial and cranial features from Italian convicts, 383 dead,3839 alive(over 4000) = conclusion 40% of criminal acts can be accounted for by people with atavistic characteristics
A03: Atavistic form criminology
Strength: Held as ‘father of modern criminology’ due to large contribution to criminology. shifted the emphasis in research away from moralistic, also heralded the beginning of criminal profiling
A03: Atavistic form Racial
Limitation: Racial undertones of work, many features identified are most likely found among african descent. Also his work may unintentionally support the ‘eugenic philosophies’(belief that certains group should not bread bc they are inferior),therefore racial undertones overshadows his work
A03: Atavistic form Evidence
Limitation: Contradictory evidence for atavistic form, a study compared 3000 criminals and non criminals = no evidence that there is a distinct type of physical features. Only slight support for a lower IQ, therefore questions the key element in his theory.
A03: Atavistic form Lombroso’s control group
Limitation: Poor control in his research due to no comparison to a control group, also many criminals studied had psychological disorders which could act as confounding variables
A03: Atavistic form Causation
Limitation: Causation is a problem, as having atavistic features doesn’t mean it is the cause of offending. Other factors can influence facial and cranial features(e.g.poverty) Although, Lombroso did later acknowledge that criminals could be made as well as born one
What do genetic explanations for crime suggest
Would-be offenders inherit a gene, or combination of genes which predisposes them to commit crime.
How does twin studies illustrate the importance genes as an explanation for offending
A study was conducted investigating 13MZ and 17DZ(13 identical) twins where one of them had spent time in prison. Found that 10 of the MZ had a co-twin in prison, while only 2 of the DZ did. A more recent study conducted found a concordance rate of 33% for MZ and 12% for DZ therefore supporting the view that offending may have a genetic compound.
How does adoption studies support genetic explanations for offending
- Adopted children with a biological parent who have a criminal record has a 50% risk of having a criminal record themselves by 18
- Adopted children without parents who have a criminal record only have a 5% risk
What two candidate genes discovered maybe associated with violent crime
MAOA- controls serotonin and dopamine which is linked to aggressive behaviour and CDH13- linked to substance abuse and ADHD. Having both is a high risk combo = 13 times more likely to have a history of violent disorder, however this research is still young/infancy and has not been replicated
What does the Diathesis-stress model suggest about genetic explanations for offending
If genes have some influence on offending it must be partly due to the environment, a combination of - genetic predisposition(make-up) and a biological or psychological ‘trigger’
What is a neural explanation
Any explanation of behaviour in terms functions of the brain and the nervous system.
What disorder has most neural studies been conducted on and why
Antisocial personality disorder (APD) bc it is associated with a lack of empathy which many criminals suffer from
Studies conducted have shown what about the prefrontal cortex ,particularly in APD
Reduced activity in the prefrontal cortex and an 11% reduction in the volume of grey matter
Are APD individuals able to feel empathy
Yes, but it is suggested that they have a neural ‘switch’ that turns on and off, in a normally-functioning brain this is permanently on
What neuron is empathy controlled by
mirror neurons
A03: Genetic and neural explanations methodology with twins studies
Limitation: Twin studies were poorly controlled, as judgements were made based on appearance if they were MZ or DZ. Concordance rates maybe shared bc they were raised in the same environment therefore it could be due to shared experiences not genes, therefore lots of confounding variables mean twin studies lack validity
A03: Genetic and neural explanations diathesis-stress model of crime
Strength: support for the diathesis-stress model… Studies found if no adoptive or biological parents had convictions, adoptees had convictions = 13.5% had convictions. If either bio or adoptive parents had convictions = 20%. Both adoptees and bio had convitcions = 24.5% had convitons, therefore suggests both environment and genetics influence criminality
A03: Genetic and neural explanations methodology with adoption studies
Limitation: complicated by the fact many children experience late adoption, meaning they had/have contact with biological parents, therefore hard to assess the environmental impact of the biological parents
A03: Genetic and neural explanations biologically reductionist
Limitation: criminality is complex therefore reducing to a genetic or neutral level is wrong, In isolation these explanations is too simplistic. Crime runs in family but so does mental illness,poverty….
A03: Genetic and neural explanations biologically determinist
Limitation: Legal issues appear as we believe criminals act in free will, therefore a criminal gene complicates it. Only in extreme cases of mental illness can someone claim they weren’t acting with free will. Therefore raises ethical questions about what should we do about thoses suspected to have the gene.
What are the three personality dimensions of Eysenck’s theory
Introversion - Extraversion (E)
Neuroticism - Stability (N)
Psychoticism - Socialisation (P)
What is biological basis in Eysenck’s theory
Suggested that personality traits are biological and based on our inherited nervous system.
What is the biological feature associated with extroverts in Eysenck’s theory
Underactive nervous system therefore seek excitement and stimulation so they engage in risk-taking behaviours
What is the biological feature associated with neurotic individuals in Eysenck’s theory
High levels of reactivity in the sympathetic nervous system, therefore respond fast to threats(fight or flight)
It means they are more nervous,jumpy,overanxious and difficult to predict.
What is the biological feature associated with psychotic individuals in Eysenck’s theory
Higher levels of testosterone meaning they are cold,unemotional and prove to aggression.
According to Eysenck’s theory what is the criminal personality type a combination of
Neurotic extravert + high psychoticism(ENP)
What role does socialisation play in the criminal personality according to Eysenck
Criminal behaviour is seen as developed immaturely and they are only concerned with immediate gratification bc they act impatient and cannot wait for things,
Through socialisation children are taught to delay gratification and become more socially oriented. But Eysenck believed people with high E and N scores would find it hard to be conditioned, therefore they are less likely to learn anxiety responses to antisocial impulses.
How can you measure the criminal personality
Eysenck developed the Eysenck Personality Inventory (EPI), a psychological test which locates respondents along the E and N dimensions to determine personality type. Later a scale was added to measure psychoticism.
What is a central concept of Eysenck’s theory
The notion that personality can be measured
A03: Eysenck’s theory evidence
Strength: When comparing 2070 male prisoners to a control of 2422 = higher scores on P,E,N. However, when the studies were reviewed = found that high P scores, but not on E or N + little evidence of consistent differences in EEG(measures cortical arousal)between introverts and extroverts