Forensic Psychology Flashcards
Offender profiling
- B|T
- What is offender profiling?
- What is the main aim of offender profiling?
- What methods are used in offender profiling?
- What is offender profiling used for?
- What are the two approaches to profiling?
- This is an investigative tool used by police when solving crimes
- Main aim of OP is to narrow likely suspects, professional profilers often called to work with police especially in high profile murder cases
- Methods include careful scrutiny of crime scene, analysis of other evidence including witness reports
- Used to generate hypotheses about probable characteristics (charac) of offender
- This includes potential age, background, occupation etc
- Two approaches to profiling, top-down approach and bottom-up approach
The top-down approach
- Where did this approach originate from?
- What did the FBI conclude?
- What does each category contain?
- How is this used by offender profilers?
- Originated from US, as a result of work done by FBI in 1970s
- FBI’s Behavioural Science Unit drew upon data collected from in-depth interviews with 36 sexually-motivated murderers (includes Ted Bundy and Charles Mason)
- Concluded data could be categorised, organised or disorganised crimes/murders
- Each category has certain charac, if data from crime scene matches with some charac of a category, we can predict other charac that may be likely
- This therefore can be used to find the offender
- Offender profiler’s using this method would collect data about murder (charac of murderer, crime scene etc), then decide category the data best fits in
Types of offender
- O|D
- What are the two types of offender?
- How are the two different?
- What does this generally correlate to?
- Two types off offender, organised and disorganised
- Distinction based on idea that serious offenders have certain signature (“ways of working”, referred to as modus operandi)
- These generally correlate with set of social and psych charac that relate to individual
Organised offenders
- Describe the characteristics and behaviours of this type of offender
- Show evidence of having planned crime in advance, victim deliberately targeted, suggests individual has “type” of victim they seek out
- Maintain high degree of control during crime, operate with almost surgical precision, little evidence/clues left at crime scene
- Above-average intelligence, in a skilled, professional occupation, socially and sexually competent (skilled), usually married may even have children
- Remember they tend to be like this, not always like this
Disorganised offenders
- Describe the characteristics and behaviours of this type of offender
- Show little evidence of planning, suggests offences may be spontaneous (spur-of-the-moment acts)
- Crime scene tends to reflect impulsive nature of the attack, body usually still at the scene
- Appears to have been very little control from offender, usually have lower-than-average intelligence, usually in unskilled work or unemployed
- Often have history of sexual dysfunction, failed relationships, tend to live alone, relatively close to where offence took place
Constructing an FBI profile
- D|C|C|P
- What are the four main stages in the construction of an FBI profile?
- Describe each of these stages
- Four main stages, data assimilation, crime scene classification, crime reconstruction and profile generation
- Data assimilation, profiler reviews evidence (crime scene photographs, pathology reports, witness reports etc)
- Crime scene classification, organised or disorganised
- Crime reconstruction, hypotheses of sequence of events, behv of victim etc
- Profile generation, hypotheses related to likely offender (demographic background, physical charac, behv etc)
Evaluation of top-down approach
- C|CP|M|FE|NAC
- Research support (Canter et al 2004)
- Counterpoint (Godwin 2002)
- Wider application (Meketa 2017)
- Flawed evidence (Canter et al)
- Not applicable to all crime (Mischel 1968)
Research support (Canter et al 2004)
- Strength, support for distinct organised categories of offenders
- Canter et al (2004) conducted analysis of 100 US murders committed by different serial killers
- Smallest space analysis used; stats technique identifies correlations across different samples of behaviour
- Used in this case to assess co-occurrence off 39 aspects of serial killings
- Included following, whether torture or restraints used, whether there was an attempt to conceal the body, the murder weapon used, and the cause of death
- Analysis revealed there seems to be a subset of features of many serial killings that matched FBI’s typology for organised offenders
- Suggests key component of FBI typology approach has some validity
Counterpoint (Godwin 2002)
- Many studies suggest organised and disorganised types are not mutually exclusive (can be mix of both)
- Variety of combos that occur at any murder scene
- Godwin (2002) argues in reality it’s difficult to classify killers as one type or the other
- Killer can have multiple contrasting charac (high intelligence and sexual competence, spontaneous murder leaving victim’s body at crime scene)
- Suggests organised-disorganised typology is more likely to be a continuum rather than one or the other
Wider application (Meketa 2017)
- Strength, approach can be adapted to other kinds of crime such as burglary
- Critics claimed technique only useful for limited number of crimes such as sexual-motivated murder
- Meketa (2017) reported 85% rise in solve cases in three US states when top-down profiling was applied to burglary
- Method used retained organised-disorganised, also introduced other categories
- Interpersonal (offender knows victim, steals something significant) and opportunistic (generally inexperienced young offender)
- Suggest top-down profiling has wider application than originally assumed
Flawed evidence (Canter et al)
- Limitation, evidence it’s based on
- FBI profiling developed using interviews from 36 murderers
- Canter et al argued sample poor, not random, not large sample, did not include different kinds of offenders
- No standard set of questions, interviews different, not really comparable
- Suggests top-down profiling does not have a good, scientific basis
Not applicable to all crime (Mischel 1968)
- Top-down approach based on principle of behavioural consistency
- Offenders have charac ways of working (their modus operandi)
- Situationist psychologist such as Mischel (1969) questioned behavioural consistency
- Argued behv more driven by situation than personality
- Suggests people not always aggressive, just aggressive in certain situations
- Suggests top-down approach may not always lead to successful identification of the offender
The bottom-up approach
- What is the bottom-up approach, what is its aim?
- How is a profile made?
- How does the approach differ to the top-down approach?
- Aim of approach is to generate picture of offender (likely charac, routine behv, social background)
- Obtained through systematic analysis of evidence at crime scene
- Profile is “data-driven”, obtained as investigator engages in deeper and more rigorous scrutiny of details of offence
- Approach is more grounded in psych theory than top-down approach
Investigative psychology
- What is investigative psychology?
- What does it attempt to do, what is its aim?
- What concept is central to this approach?
- What other variable is key?
- What is forensic awareness?
- A form of bottom-up profiling that matches details from crime scene with statistical analysis of typical offender behv patterns based on psych theory
- Attempts to apply stat procedures with psych theory to analysis of crime scene evidence
- Aims to establish patterns of behv likely to occur or coexist across crime scenes
- This is used to develop a statistical database that acts as a baseline for comparison
- Specific details of offence can be matched against the databases to reveal important details about offender (personal history, family background etc)
- May also determine if series of offences are linked (likely to be committed by same person)
- Central to approach is concept of interpersonal coherence (way offender behaves at scene, includes how they “interact” with victim, may reflect behv of offender in everyday situations)
- Dwyer (2001), some rapists like to humiliate victims and maintain max control, others more apologetic (could tell police how offender relates to women more generally)
- Significance of time and place, key variable, may indicate where offender is living
- Forensic awareness, individuals have been interrogated by police before, their behv may denote how mindful they are of “covering their tracks”
Geographical profiling
- What is geographical profiling?
- How is it used?
- What principle is it based on?
- Explain what this principle is
- What assumption is made when using this approach?
- What is Canter’s and Larkin (1993) circle theory?
- What is a marauder, what is a commuter?
- What gives investigators an insight of the nature of the offence?
- What other things are revealed?
- Form of bottom-up profiling, based on principle of spatial consistency, offender’s operational base and possible future offences revealed by geo location of their previous crimes
- Uses info of location of linked crime scenes to make inferences of home or operational base of offender, known as crime mapping
- Based on principle of spatial consistency (ppl commit crime within a limited geo space)
- Used with psych theory to create hypotheses about how offender thinks and their modus operandi
- Assumption made that serial offenders restrict crimes to geo areas they are familiar with
- Understanding spatial pattern of their behv provides investigators “centre of gravity”, likely to include offender’s base (usually in middle of spatial pattern)
- This is the basis of Canter’s and Larkin (1993) circle theory because pattern of offending forms circle around offender’s home base
- Distribution of offences leads us to describe offender in two ways, marauder or commuter
- The marauder operates in close proximity to their home base
- The commuter is likely to have travelled a distance away from their usual residence
- Such spatial decision-making offers investigators insight of nature of offence (planned or opportunistic)
- Also reveals offenders “mental maps”, mode of transport, employment status, approximate age etc
Evaluation for bottom-up approach
- C|CP|E|I|MR
- Evidence for investigative psychology (Canter and Heritage 1990)
- Counterpoint (Circular argument)
- Evidence for geographical profiling (Lundrigan and Canter 2001)
- Geographical information insufficient (Ainsworth 2001)
- Mixed results (Copson 1995, Kocsis et al 2002)
Evidence for investigative psychology (Canter and Heritage 1990)
- Strength, evidence supports use of investigative psychology
- Canter and Heritage (1990), analysis of 66 sexual assault cases, data examined using smallest space analysis
- Several behvs identified as common in different samples of behv such as use of impersonal language and lack of reaction to victim
- Each individual displayed charac pattern of such behvs, this can help establish whether 2+ offences committed by same person (referred to as “case linkage”)
- Supports one of the basic principles of investigative psychology and the bottom-up approach, people consistent in their behv
Counterpoint (Circular argument)
- Case linkage depends on database that only consists of historical crimes that are solved
- Fact crimes were solved may be because it was straightforward to link crimes together, makes this a circular argument
- Suggests investigative psychology tells us little about crimes that have few links between them (unsolved)
Evidence for geographical profiling (Lundrigan and Canter 2001)
- Strength, evidence supporting geo profiling
- Lundrigan and Canter (2001), gathered info from 120 murder cases involving serial killers in US
- Smallest space analysis reveals spatial consistency in behv of killers
- Location of each body disposal site created “centre of gravity”
- Assumed this happens because, when offender starts from home base, they go in different direction each time they dispose a body, creates circular effect around home base
- Offender bases consistently located in centre of the pattern; effect more noticeable for marauders (offenders travel short distance from home base)
- Supports view that geo info can be used to identify an offender
Geographical information insufficient (Ainsworth 2001)
- Limitation, geo profiling may not be sufficient on its own
- Success of geo profiling (as well as investigative psychology) may be reliant on quality of data that police can provide
- Recording crime not always accurate, can vary between police forces, estimated 75% crimes not even reported (“dark figure of crime”)
- Questions value of approach that relies on accuracy of geo data, even if info correct
- Ainsworth (2001), critics claim other factors just as important in creating profile such as time of offence and age and experience of offender
- Suggests geo info alone may not always lead to successful capture of an offender
Mixed results (Copson 1995, Kocsis et al 2002)
- Copson (1995), surveyed 48 police departments, found advice provided by profiler judged “useful” in 83% of cases, suggests it’s a valid investigative tool
- However, only 3% of cases lead to accurate identification of offender
- Nickell case, real killer (Robert Napper) ruled out, too tall to fit police profile officers were given
- Kocsis et al (2002), chemistry students produce more accurate offender profiles on solved murder case than experience senior detectives
- Suggests offender profiling may have little practical value when it comes to solving cases
- May focus police investigations, offer new lines of enquiry, falls short on what its designed to do (lead to identification of the offender)
Biological explanations of offending behaviour- Historical approach
- What did Lombroso’s book in 1876 suggest?
- What is atavistic form?
- How is this viewed in today’s standard?
- Lombroso (1876), Italian physician wrote a book translated “the criminal man”
- Suggested that criminals were “genetic throwback”, a primitive subspecies that were biologically different from non-criminals, ill-suited to conforming to rules of modern society (Atavistic form)
- In today’s standard his theory is seen as speculative and naïve
A biological approach
- What do offenders lack according to Lombroso?
- Describe the nature of an offender according to Lombroso
- How did he view offending behaviour?
- What did Lombroso propose at the time?
- Offenders seen by L as lacking evolutionary development
- Savage and untamed nature meant they found it impossible to adjust to demands off civilised society, inevitably turn to crime
- L saw offending behv as a natural tendency rooted into the genes of offenders
- L proposed a new perspective at the time he was writing, offending behv was innate, offender not to blame for actions
- In this way his ideas were revolutionary
Atavistic form
- What did Lombroso argue about offenders?
- Where were these features mainly located?
- Give examples of these features
- Give examples of other aspects of born offenders
- L argued offender subtype could be identified using particular physiological “markers” that were linked to particular types of offence
- Offenders would possess these “markers”, these are bio determined “atavistic” charac
- Mainly features of face and head (atavism did include other features), make offenders physically different from rest of us
- In terms of cranial (skull) charac, atavistic form included narrow, sloping brow, strong prominent jaw, high cheekbones and facial symmetry
- Other markers included dark skin, existence of extra toes, nipples or fingers
- L also suggested other aspects of born offender including insensitivity to pain, use of slang, tattoos and unemployment
Offender types
- How did Lombroso categorise types of offender?
- What characteristics do murderers possess?
- What characteristics do sexual deviants possess?
- What characteristics do fraudsters possess?
- L categorised particular types of offender in terms of their physical and facial charac
- Murderers described as having bloodshot eyes, curly hair and long ears
- Sexual deviants had glinting eyes, swollen, fleshy lips and projecting ears
- Fraudsters lips were thin and “reedy”
Lombroso’s research
- Outline his procedure and findings
- L meticulously examined facial and cranial features of hundreds of Italian convicts (living and dead)
- Concluded there was an “atavistic form”, these features were key indicators of criminality
- L examined skulls of 383 dead convicts, 3839 living ones, concluded 40% criminal acts committed by people with atavistic characteristics
Evaluation for Atavistic form
- L|CP|CE|PC|NN
- Lombroso’s legacy (Hollin 1989)
- Counterpoint (Racist, DeLisi 2012)
- Contradictory evidence (Goring 1913)
- Poor control (Lombroso 1876, Hay and Forest 2009)
- Nature or Nurture
Lombroso’s legacy (Hollin 1989)
- Strength, his work changed the face off the study of crime
- Hailed “father of modern criminology”, he coined the term “criminology” (Hollin 1989)
- Credited for shifting emphasis in crime research away from moralistic discourse (offenders judged as being wicked and weak-minded)
- Shift towards more scientific position, evolutionary influences and genetics, individual not to blame
- By attempting to describe particular types of people likely to commit particular crime, heralded the beginning of offender profiling
- Suggests L made major contribution to science of criminology
Counterpoint (Racist, DeLisi 2012)
- Critics including DeLisi (2012) questioned if L legacy entirely positive
- Attention drawn to racist undertones of L’s work; features identified as atavistic (curly hair, dark skin) most likely found in ppl of African descent
- Basically, suggesting Africans more likely to be offenders, view fitted 19th century eugenic attitudes
- Suggests some aspects of theory highly subjective not objective, influenced by racial prejudices of the time
Contradictory evidence (Goring 1913)
- Limitation, evidence that contradicts link between atavism and crime
- Goring (1913), wanted to establish whether anything physically atypical about offenders
- Compared 3000 offenders and 3000 non offenders, concluded no evidence that offenders are distinct group with unusual facial and cranial charac
- However, he did suggest offenders have lower-than-average intelligence
- Challenges idea that offenders can be physically distinguished from rest of population, therefore unlikely to be a subspecies
Poor control (Lombroso 1876, Hay and Forest 2009)
- Limitation, L’s methods of investigation were poorly controlled
- Did not have control of important variables, did not compare offender sample with non-offender control group, this control could have dealt with confounding variables
- Hay and Forrest (2009) demonstrated links between crime and social condition such as poverty and poor educational outcomes
- These links could explain why offenders more likely to be unemployed for example
- Suggests L’s research does not meet modern scientific standards
Nature or Nurture
- L’s work raises question of whether criminals are born or made
- Atavistic form suggests crime has bio cause, genetic throwbacks who are further back on evolutionary chain than the law-abiding majority
- Facial and cranial features may be influenced by other factors such as poverty of poor diet (nurture) rather than being inherited
- Goring’s replication of L’s investigations demonstrated the distinction L proposed was not present
- Suggests criminal are both born and made, nature and nurture interact where crime is concerned
- Evolutionary argument flawed, no reason to believe atavism would be naturally selected
Biological explanations of offending behaviour- Genetic explanations
- What does this explanation suggest?
Suggest would-be-offenders inherit a gene or combo of genes that predispose them to commit a crime
Twin and adoption studies (Christiansen 1977, Crowe 1972)
- Describe Christiansen’s (1977) study and findings
- What do the findings suggest?
- Describe Crowe’s (1972) findings
- What do the findings suggest?
- Christiansen (1977) over 3500 twin pairs in Denmark, concordance rates for offending behv 35% in MZ male twins, 13% DZ male twins (slightly lower rates for females)
- Included all twins born between 1880 and 1910 in region of Denmark
- Offender behv checked against Danish police records
- Data indicates not just behv that may be inherited but the underlying predisposing traits
- Crowe (1972), adopted children whose bio mom has criminal record had 50% risk of having criminal record by 18
- Adopted children whose bio mom had no criminal record had 5% risk of having criminal record by 18
Candidate genes (Tiihonen et al 2015)
- Describe Tiihonen et al’s (2015) analysis and findings
- What do the findings suggest?
- What does (1) gene do?
- What does (2) gene do?
- Tiihonen et al (2015), genetic analysis almost 800 Finnish offenders
- Suggested two genes (MAOA and CDH13) may be associated with violent crime
- MAOA gene regulates serotonin and dopamine in the brain, linked to aggressive behv
- CDH13 gene linked to substance abuse and ADHD
- Analysis found 5-10% off all severe violent crime in Finland attributable to MAOA and CDH13 genotypes
Diathesis-stress model
- Where does the tendency to commit offending behaviour come from?
- Give an example of this
- If genetics do have some influence on offending, likely that this is at least partly moderated by effects of the environment
- Tendency towards offending behv may come through combo of genetic predisposition and bio or psych trigger
- Example, being raised in dysfunctional environment, having criminal role models
Evaluation for Genetic explanation
- I|S|NN
- Issues with twin evidence
- Support for diathesis-stress (Mednick et al 1984)
- Nature and nurture
Issues with twin evidence
- Limitation, assumption of equal environments
- “Shared environment assumption” may apply more to MZ twins than DZ twins because MZ identical, people (especially parents) treat them more similarly
- This in turn affects their behv, higher concordance rate for MZ may simply be because they are treated more similarly than DZ twins
Support for diathesis-stress (Mednick et al 1984)
- Strength, support for diathesis-stress model of offending
- Mednick et al (1984), 13,000 Danish adoptees
- Neither bio or adoptive parents had convictions, percentage of adoptees that did was 13.5% (quite high)
- Figure rose to 20% when either bio or adoptive parents had convictions
- 24,5% when both bio and adoptive parents had convictions
- Shows genetic inheritance plays important role, and so does environmental influence, provides support for diathesis-stress model of crime
Nature and nurture
- It is presumed that adoption studies are a good way of separating nature and nurture
- However, this is complicated by fact that many adoptions take place when children older
- Spent several years with bio parents in early and arguably most influential years
- Many adoptees also encouraged to maintain contact with bio family, environmental influence may still be felt
- Suggests adoption studies offer some insight into genetic influences, should be treated with caution
- Other issues mean socialisation processes between adopted children and bio parents may still be taking place
Biological explanations of offending behaviour- Neural explanations
- What does this explanation suggest?
- What is APD, what is it associated with?
- Neural difference in brains of offenders and non-offenders
- Evidence in this area involved individuals diagnosed with antisocial personality disorder (APD)
- APD associated with reduced emotional responses, lack of empathy for feelings of others
- APD is a condition that characterises many convicted offenders
Prefrontal cortex (Raine and colleagues 2000)
- What did Raine conduct studies on, what were his findings?
- What does the prefrontal cortex regulate?
- Describe Raine and colleagues (2000) findings
- Raine conducted studies of APD brain, reported several dozen brain-imaging studies demonstrating individuals with antisocial personalities had reduced activity in prefrontal cortex
- Prefrontal cortex regulates emotional behaviour
- Raine and colleagues (2000) found 11% reduction in volume of grey matter in prefrontal cortex of people with APD compared to controls
Mirror neurons (Keysers 2011)
- What does recent research suggest about APD?
- What did Keysers (2011) discover/find?
- What does this suggest about people/individuals with APD?
- Recent research suggests offenders with APD can experience empathy, do so more infrequently than rest of us
- Keysers (2011), found only when offenders asked to empathise with person in film experiencing pain, did their empathy reaction (controlled by mirror neurons) activate
- Suggests APD individuals not totally without empathy, may have neural “switch” that can be turned on and off, unlike rest of us where empathy switch permanently on
Evaluation for Neural explanations
- BE|F|BD
- Brain evidence (Kandel and Freed 1989)
- Intervening variables (Farrington 2006, Rauch et al 2006)
- Biological determinism
Brain evidence (Kandel and Freed 1989)
- Strength, support for link between crime and frontal lobe
- Kandel and Freed (1989), reviewed evidence of frontal lobe damage and antisocial behv
- People with frontal lobe damage tended to show impulsive behv, emotional instability and inability to learn from mistakes
- Frontal lobe associated with planning behv, supports idea that brain damage may be causal factor in offending behv
Intervening variables (Farrington 2006, Rauch et al 2006)
- Limitation, link between neural differences and APD may be complex
- Other factors may contribute to APD, and ultimately to offending
- Farrington et al (2006), studied men who score high on psychopathy (APD)
- Individuals experiences various risk factors during childhood, raised by convicted parents, physically neglected
- Could be that early childhood experiences caused APD, some neural differences associated with it such as reduced activity in frontal lobe due to trauma (Rauch et al 2006)
- Suggests relationship between neural differences, APD and offending is complex, may be other intervening variables that have an impact
Biological determinism
- Bio approach to crime suggests criminal behv determined by genetic/neural factors that cannot be controlled by the person
- Person does not choose genetic make-up or structural abnormalities in brain
- If they make person more likely to commit crime, suggests crime not entirely act of free will
- Therefore, person should not be held responsible for a crime they may commit
- However, justice system based on notion that we all have responsibility for our actions
- Only in extreme circumstances (mental disorders) is the individual judge to lack responsibility
- Suggests we should excuse some people; this is not possible though because no one would have responsibility resulting in no real justice being served when a crime is committed
- Implies that bio criminals may require different. Less severe form of punishment due to the fact that they cannot take full responsibility for their actions
- Also implies bio criminals will never be fully rehabilitated if their actions are not a matter of choice
Psychological explanations of offending behaviour- Eysenck’s theory (Theory of the criminal personality)
- What did Eysenck’s (1946) personality theory propose about behaviour?
- What forms personality characteristics or traits?
- What did Eysenck later add?
- Eysenck important figure in personality and intelligence research during middle 20th century
- Eysenck (1946) proposed behv could be represented along two dimensions, introversion-extraversion (E) and neuroticism-stability (N)
- Two dimensions combine to form variety of personality charac or traits
- Eysenck later added third dimension, psychoticism-sociability (P)
Biological basis
- What is the origin of personality traits?
- What determines our personality, what does this suggest?
- What are E?
- What are N individuals?
- What are P individuals?
- According to Eysenck, personality traits are biological in origin, come about through types of nervous system we inherit (all personality types have innate, bio basis)
- Extraverts, underactive NS, means they constantly seek excitement, stimulation, likely to engage in risk-taking behvs, tend not to condition easily therefore do not learn from their mistakes
- Neurotic individuals, high level of reactivity in sympathetic NS, respond quick to situations of threat (Fight or Flight)
- Tend to be nervous, jumpy, overanxious, general instability means their behv often difficult to predict
- Psychotic individuals, suggested to have higher levels of testosterone, unemotional and prone to aggression
The criminal personality
- What is the criminal personality type?
- What are Ns like?
- What are Es like?
- What are Ps like?
- Criminal personality type is neurotic-extravert-psychotic
- Neurotics are unstable, therefore prone to overreact to situations of threat
- Extraverts seek more arousal, thus engage in dangerous activities
- Psychotics are aggressive and lack empathy
The role of socialisation
- What links personality and offending behaviour according to Eysenck’s theory?
- How did Eysenck view offending behaviour?
- What is the process of socialisation?
- What does Eysenck suggest about offenders according to socialisation?
- Why is this the case for offenders?
- What are the consequences of this?
- Eysenck’s theory suggests personality linked to offending behv via socialisation processes
- Eysenck saw offending behv as developmentally immature, it is selfish and concerned with immediate gratification (offender impatient, cannot wait for things)
- Process of socialisation, children taught to become more able to delay gratification, more socially oriented
- Eysenck believed people with high E and N scores had NS that made them difficult to condition, resulting in them being less likely to learn anxiety responses to antisocial impulses
- This basically means they don’t learn fear and guilt as a response the body produces when committing crimes
- Consequently, more likely to act antisocially in situations where opportunity present itself (they are more likely to break the law when they can)
Measuring the criminal personality
- What is one of the central points of Eysenck’s theory?
- What is EPQ, what is the purpose of it?
- Why is the measurement of personality important to Eysenck’s theory?
- Notion that personality can be measured is central to Eysenck’s theory
- He developed Eysenck Personality Questionnaire (EPQ), form of psych test, locates respondents along the E, N and P dimensions to determine their personality type
- If individual scores high on E, N and P they are considered to have a criminal personality type
- Measurement of personality important part of Eysenck’s theory, enables him to conduct research relating personality variables to other behvs such as criminality
Evaluation for Eysenck’s Theory
- RS|CP|TS|CF|MP
- Research support (Eysenck and Eysenck 1977)
- Counterpoint (Farrington et al 1982, Küssner 2017)
- Too simplistic (Moffitt 1993)
- Cultural factors (Bartol and Holanchock 1979)
- Measuring personality
Research support (Eysenck and Eysenck 1977)
- Strength, evidence to support criminal personality
- Eysenck and Eysenck (1977), compared 2070 prisoner scores on EPQ with 2422 controls
- One measure of E, N and P, across all age groups that were sampled, prisoners record higher than average scores than controls
- Agrees with predictions of the theory, offenders’ rate higher than average across three dimensions Eysenck identified
Counterpoint (Farrington et al 1982, Küssner 2017)
- Farrington et al (1982) conducted meta-analysis of relevant studies, reported offenders tended to score high on measure of P but not for E and N
- Also, inconsistent evidence of differences on EEG measures (used to measure cortical arousal) between extraverts and introverts (Küssner 2017)
- Casts doubts on physiological basis of Eysenck’s theory
- This means some central assumptions of criminal personality have been challenged
Too simplistic (Moffitt 1993)
- Limitation, idea all offending behv can be explained by personality traits alone
- Moffitt (1993), drew distinction between offending behv that occurs only in adolescence (adolescence-limited) and that continues into adulthood (life-course-persistent)
- Argued personality traits alone poor predictor of how long offending behv would go on for, sense of if someone likely to become “career offender”
- Considered persistence in offending behv was a result of reciprocal process between individual personality traits on one hand and environmental reactions to these traits on the other
- Presents more complex picture than Eysenck suggested, that course of offending behv determined by interaction between personality and environment
Cultural factors (Bartol and Holanchock 1979)
- Limitation, cultural factors not taken into account
- Criminal personality could vary according to culture
- Bartol and Holanchock (1979) studied Hispanic and African-American offenders in prison in New York
- Offenders divided into six groups based on offending history and the nature of their offences
- Found all six groups less extravert than non-offender control group
- Eysenck would expect offenders to be more extravert
- B and H suggested this was because sample used was very culturally different compared to the one investigated by Eysenck
- Questions how far criminal personality can be generalised, suggests it may be a culturally relative concept (imposed etic)
Measuring personality
- Eysenck’s theory built on premise that it is possible to measure personality through psych tests (EPQ)
- Usefulness of EPQ based on its potential for real-world application, able to see how criminal personality differs from rest of population across different dimensions
- Early criminal traits could be recognised in the young, steps may be taken to deal with this, by changing socialisation process for example
- However, critics suggest personality type not reducible to “score”
- Suggests personality is too complex and dynamic to be quantified
- People may be different moods and personalities all at once, EPQ not tapping into person’s essence or revealing stable criminal traits
- May undermine claims made by Eysenck about being able to identify “natural” criminal using EPQ as personality may not be static
Psychological explanations of offending behaviour- Cognitive explanations
- What are the two cognitive explanations for offending behaviour?
- Two cognitive explanations for offending behaviour
- Level of moral reasoning and Cognitive distortions