Topic 9: Forensic Psychology Flashcards
Top-down Approach
- Originated in the U.S
- An analysis of previous crimes creates a profile of a likely offender. A profiler uses this knowledge to narrow the field of possible suspects. Unlike the bottom-up approach, the top-down approach relies on the intuition and beliefs of the profiler. It’s less scientific.
There are 6 stages of the top-down approach (Douglas et al, 2006)
1) Profiling Input: Descriptions of crime scene (photographs and sketches), background info about the victim (employment, relationships, habits etc), details of the crime (weapons, cause of death aoutopsy report).
2) Decision Profiling: Profiler starts to make decisions about the data and identify meaningful patterns. Factors considered are: murder type (mass, spree or serial?), Time (night or day? Was the muder over a long time or short time?), Location (was the crime scene e.g. where a person was kidnapped) the same as the murder scene?)
3) Crime Assessment: Crime is classified as organised or disorganised or mixed (characteristics of both). Chain of events in pieced together before, during and after the commision of a crime. Chronology’s made.
4) Criminal profile: The profiler can now use the info to hypothesis about the type of person who commited the cime. This may include: age, sex, location, social status, intelligence, physiological characteristics, etc.
5) Crime Report: A written report is given to the police and persons matching the profile are evaluated. If new evidence is generated and/or no suspect is identified, then the process goes back to step 2.
6) Arrest & Review: If a suspect is apprehended the profile-generating process is reviewed to check for validity.
Disorganised vs organised types of offenders
Disorganised type of offender: The crime scene is left with many clues such as fingerprints, there is little evidence of engagement with the victim, and the offender has lower intelligence and competence.
Organised type of offender: This type of offender commits planned crime and may engage in violent fantasies with the victim and is high in intelligence and socially competent.
Evaluate the top-down approach
- useful for narrowing down a list of suspects and predicting future criminal behavior.Helpful when there isn’t much physical evidence. Copson questioned 184 US police officer of whom 82% said the technique was operationally useful and over 90% said they would use it again.
- The original data on which the diorganised/organised classification is based may be flawed: The data came from interviews with 36 of the most dangeous and sexually motivated murderers - these individuals are highly manipulatively, reducing the reliability of the data. They are also extrem cases making findings difficult to generalise to all crimes,.
- Lacks validity and reliability: Alison et al - Gave 2 groups police officers the same profile, but each group was provided details of 2 very different offenders (one of these versions were real). In each group 75% rated the profile as somewhat accurate and 50% as generally/very accurate. Argues that the predictions in profiles are ambiguous.
- Simplicity & reductionism: Reductionist as it uses simple classification systems . David Cannter et al analysed 39 aspects of serail killer murders comitted by 100 US serial killers and found no clear divison between organised and disorganised crime. Douglas later proposed a third category called the ‘mixed’ offender but this lessens the usefulness of ditinct categories.
Offender profiling
Offender profiling is a method of working out the characteristics of an offender by examining the characteristics of the crime and the crime scene.
There are two approaches to offender profiling: The top-down approach and the bottom-up approach
General Evaluations for offender profiling
- The effectiveness of profiling is difficult to assess because it is never used in isolation.
- Alison et al - Gave 2 groups police officers the same profile, but each group was provided details of 2 very different offenders. In each group 75% rated the profile as somewhat accurate and 50% as generally/very accurate. Argues that the predictions in profiles are ambiguous.
- Snook found that Canadian major crime officers agreed that criminal profiling was helps solve cases (94%) & is a valuable investigative tool (88%).
- All profiling methods suffer from the problem of statistically abnormal offenders, who’s behviour doesn’t match with previous experiecne or what is statistically probable.
The Bottom-up Approach
A data-driven approach where statistical techniques are used to produce predictions about the likely characteristics an offender.
Canter suggested two approaches within the bottom-up approach:
Investigative psychology:
A form of bottom-up profiling based on psychological theory.
1) Interpersonal coherence Behaviour/habits in everyday like and in elements of a crime may be correlation & may change overtime.
2) Forensic awareness Certain behaviours (i.e concealing fingerprints) may reveal an awareness of particular police techniques and past experience.
3) Smallest space analysis A statistical techniques using computer databases. Identifies patterns to see if a series of offences are linked.
Geographical Profiling:
Used to make inferences about where an offender is likely to live based on the pattern shown by location or locations of a series of crimes.
Canters circle theory proposed 2 models of offender behaviour:
- marauders (commit crimes close to home)
- Commuters (travel away from home to offend)
A diameter of a circle is created using the distance between the two farthest crimes. The center of the circle is considered the most likely location of the offender’s residence. Creates an area to search.
Criminal geographic targeting (CGT)
An algorithm, which uses geographical co-ordinates of crimes, to produce a 3D probability surface, called a jeopardy surface, that shows the most likely areas where the offender lives.
Evaluate the bottom up approach
- Lundrigan & Canter (2001): combined analysis from 120 murder cases & found that the offender’s home base was invariably located in the center of the crime scene pattern. Supports Canter’s claim that spatial info is a key factor in determining the base of an offender.
- Copson surveyed 48 British police forces & found that advice provided by the profiler was judged by be useful in 83% of cases but led to accurate identification of offender in only 3% of cases. Studies into BUA have found mixed results.
- Application to a wide range of offences Smallest space analysis & geographical profiling can be used to investigate crimes such a burglary & theft as well as more serious crimes.
- Scientific and objective as it’s more grounded in evidence & psychological theory than inferences/speculation. Assistance of AI. CA: algorithms sometimes go wrong.
- Canter &Larkin showed that 87% of 45 British sexual assaulters were marauders. Supports the circle hypothesis. CA: it’s difficult to know if a criminal is a marauder or commuter before apprehension. Can be difficult to distinguish offences by separate offender and some offences may not be recorded, reducing it’s application.
- Has led to some wrongful convictions: After new forensic evidence emerged, Robert Napper was convicted of Rachael Nickell’s murder. He was originally ruled out because he was taller than the picture given.
- Canter used profiling to identify John Duffy “the Railway Rapist” (1980s). He used geographical profiling and discovered the killer was a marauder. The profile canter created said he was married with no children and had marraige problems; he was physically small with feelings of unattractiveness and lived in Kilburn or Cricklewood. The offender profiling was found to be accurate as Duffy lived in Kilburn, was married, infertile and seperated from his wife, was 5’4 and had acne.
Biological Explanations for offending behaviour: Outline the historical approach
Lombroso, coinciding with Darwin’s theory of evolution, proposed that offenders possessed similar characteristics to lower primates and that this could explain criminality. He called this Atavistic form.
Suggested features of criminals were: asymmetric faces, long jaws, eyes defects, unusual ears more than the usual n.o. of fingers or toes etc.
Empirical evidence: He examined over 50,000 bodies making precise measurements of physiological characteristics. In a study of 383 convicted Italian criminals, he found that 21% had just one atavistic trait and that 43% had at least 5.
Environmental Influences
Lombroso later recognised other explanations for criminality:
- Born criminal: the atavistic type
- Insane criminals: Suffering from mental illness
- Criminaloids: Whose mental characteristics predisposed them to criminality under the right physical/social circumstances.
Somatotypes
Kretschmer proposed that body type could link to criminality: Studied 4,000 criminals. Classified:
- Leptosome: tall & thin - thieves
- Athletic: Violent crimes
- Pyknic: short & fat - deception sometimes violent crimes
- mixed - morality crimes
Evaluate the historical approach of offending behavior
- Paradigm shift: Lombroso is considered the founder of modern criminology, as he brought science into the study of crime, previously associated with the devil and religion.
- Lombroso had a large sample size however he had no control group. Goring compared 3,000 convicts with non-convicts & found no differences except from the fact that convicts were slightly smaller.
- Gender bias - He didn’t study women directly and had androcentric ideas believing that women were passive, low in intelligence and maternally focused so were less likely to become criminals. Suggests his explanations are based on typical 19th century views about women rather than empirical evidence.
- Criticised for being scientifical racist as characteristics he identified are more prevalent in certain racial groups (i.e. associating dark skin and curly hair, which are common in African individuals, with criminality perpetuates negative racial stereotypes.) His theories were used to justify eugenics which usually targets minorities.
- Some of Lombroso’s characteristics i.e. twisted, upturned, flat or long beak like nose, aren’t useful as they can be applied to most people.
- Support for somatotypes: Gluek & Gluek - 60% of delinquents were mesomorphs (equivalent to athletic type). William Sheldon studied 200 young adults & found the same.
Outline the neural explanation for offending
Considers the how brain structure and neurotransmitter levels may be different in criminals. In generall 8.5% of the US population have an a brain injury compared with 60% in US prisons (Harmon, 2012)
Brain structure:
- Prefrontal cortex: Regulates emotion + controls moral behaviour. Rainecited 71 brain imaging studies showing that murders, psychopaths & violent individuals have reduced functioning in the prefrontal cortex & an 11% reduction in grey matter. Lower activity in this area is associated with impulsivity/loss of control.
Limbic System: Balances emotion & motivation. Raine studied a group of 41 murderers found not guilty by reason of insanity (NGRI). Using PET scans Found abnormal asymmetries in their limbic systems in comparison to matched controls.
Neurotransmitters:
Serotonin: Help regulate emotional impulses. Low serotonin inhibits communications between amygdala (processing center for emotions e.g. pleasure, fear, addictions) and the frontal lobes, making it more difficult for the Prefrontal cortex to control emotional responses to anger, which are generated by the amygdala.
Noradrenaline: High & low levels are linked to criminal behaviour. High levels activate the SNS - fight or flight - linked to aggression/impulsivity. Low levels - lack of fear for consequences (reduces reaction to perceived threats)
Dopamine – Linked with pleasure/rewarding feelings and a desire to repeat certain behaviours. This is why dopamine has been linked to addiction and substance abuse, and therefore through this it has an indirect link to criminal behaviour.
Evaluate neural explanations for offending behaviour
Strengths:
- Research support: Raine use of PET scans = scientific empirical evidence but doesn’t establish cause & effect.
- Buitelaar (2003) found that juvenile delinquents given dopamine antagonists which reduce levels of dopamine, showed a decrease in aggressive behaviour.
- Cause or effect: Difficulty establishing whether abnormalities in the brain or low neurotranmitter levels cause crime, the result of it, or just an intervening variable. (I.e. a head injuries may be a result of a violent childhood). Research only shows a correlation.
- Real life Applications: potential for treatments (i.e.prisoners could be given diets that would enhance their serotonin levels, ingredients in artificial sweetners make serotonin production difficult).
- Over-simplified? The links between abnormal levels of a certain neurotransmitter and offending behaviour, often centre around violent and aggressive behaviour, which does not explain all types of crime i.e fruad.
- Biologically deterministic: Challenges whether the criminal can be held responsible.
- Reductionist:Ignores external factors like parenting, culture, and social learning.
Outline the genetic explanations for offending behaviour
Proposes that certain genes predispose individuals to criminals behaviour.
MAOA gene: controls dopamine & serotonin & is linked with agression.
CDH13 genes - A deficiency results in behavioural altercations such as addiction & associated symptoms with ADHD.
Evaluate the genetic explanation for criminal behaviour
Research support:
- Tiihonen studied 900 offendes & found that those with abnormalities on both the MAOA & CDH13 genes, were 13X more likely to have a history of violent behaviour than those without it. They estimated that 5-10% of all violent crime in Finland is due to abnormalities in MAOA & CDH13 genes. Recent research so reliaility is yet to be established.
Family Sudies: Brunner DNA analysis on 28 male members of a Dutch family, who had histories of impulsive & violent criminal behaviours. Found that they shared a defect in the MADA gene and had lower than average IQs. Concluded criminal behaviour is inherited.
Twin Studies: Christianson studied 3586 twin pairs in denmark. Found that male identical twins had 35%concordancefor criminality. Whereas male non-identical twins had only a 12% concordance rate. Female monozygotic twins had a 21% concordance rate for criminality.
Adoption Studies: Crowe: Studied a group of adopted children & looked at the likelihood that if the mother had a criminal record, so would the adoptee by 8 years old. F: Experimental mother (criminal record) = 50% of the adopted children had a criminal record. Control mother (no criminal record) = 5% of the adopted children had a criminal record.
Alternative explanation: Diathesis-stress
suggests thata combination of genetic predisposition and environmental stress can lead to criminal behavior. epigenetics - genes are ‘switched on’ or off by epigenomes, which are affected by environmental factors. Caspi followed about 1,000 ppl from babies. He assessed anti-social behaviour at the age of 26. Found 12% of those men with low MAOA genes had experienced maltreatment when they were babies but were responsible for 44% of violent convictions. Suggesting environment has an influebce on criminal behaviour.
- Biological explanations foucs on agressive/violent crimes, rather than non violent crimes such as theft, fraud etc which are more dfficult to link to biological explanations.
- The genetic explanation can be reductionist, ignoring other factors that may influence offending behavior.It can also have negative social implications, such as making it unethical to punish people for crimes they were biologically predetermined to commit.
Describe Eysenck’s theory for offending
Suggested that both psychological and biological components are involved in offending behaviour. Personality traits are genetic and adult personality is a product of the traits and learning experiences through life. He suggests that personality traits are 67% biologically based and believed that character traits tend to cukster along three dimnsions:
- Extraversion - Introversion : extraverts are characterised as outgoing, having positive emotions but may get bored easily.
- Neuroticism - stability : neuroticism is the tendency to experience negative emotional states (such as anger, anxiety and depression) rather than positive emotional states.
- psychotocism - normality (added later): Psychotics are egocentric, aggressive, impulsive, impersonal, lacking in empathy and generally not concerned about the welfare of other people.
Esyneck believes that the typical criminal is the neurotic-extravert; leading to unstable, unpredictable behaviours. Later added psychiticism.
he devised the Esyneck Personality Questionnaire (EPQ) which assesses and individual’s personality.
The role of socialisation:
Eysenck saw that criminal behaviour is immature and selfish, concerned with immediate gratification. The process of socialisation is when children are taught to become more able to delay gratification and more socially oriented through operant & classical conditioning .Eysenck believed that those with high E and N scores had nervous systems that made them difficult to condition, so they would not learn easily to respond to antisocial impulses with anxiety. They would be more likely to act antisocially in situations where the opportunity presented itself. Links innate personality (biologically determined) with environmental interaction.
Explain the biological basis of Eysenck’s theory
Extraversion: determined by the level of arousal in a person’s nervous system. An extraverted person is under-aroused & requires more stimulation. Therefore, they seek external stimulation to increase their cortical (brain) arousal. Introvertes are innately over-aroused and thus seek to reduce/avoid stimulation.
Neuroticism: Determined by the level of stability in the Sympathetic Nervous System - responses to threat (fightorflight). A neurotic person is highly unstable and reacts/gets upset easily.
Psychotisism: Related to high levels of testosterone.
Evaluate Eysenck’s explanation for offending behaviour
- Randy Buckner found that introverts have thicker grey matter in their prefrontal cortex (linked to thinking & decision making) than extroverts do. Suggests that introverts are more thoughtful &would make better decision.
- Eysenck & Eysenck compared 2070 male prisoners on the EPI , with controls. Prisoners recorded higher scores than controls for psychoticism, extraversion, & neuroticism. Farrington meta-analysis of 16 studies into Eysenck’s personality theory & the links to criminality. Found a consistent link between high scores of psychoticism but not the same link with extraversion & neuroticism. Found little evidence for consistent differences in EEG measures (used to measure cortical arousal) between introverts & extroverts, challenging the physiological bases of Eysenck’s theory.
- Cultural bias – Holanchock (1979) studied Hispanic and African-American offenders and found that many of the offenders were less extravert than a non-criminal control group. This would imply that Eysenck’s theory is not generalisable to other cultures.
- Unclear relationship between all 3 traits and offending behaviour which may be dependent on the type of crime. doesn’t establish cause & effect.
- Lacks explanatory power: Eysenck highlights personality traits linked wit offending behaviour but not why they commit the crimes they do, which limits rehabilitation applications.
- Reductionist - Reduces personality to a ‘score’, but personality is complex & fluid.
- Elements of biological determinism.
Outline Cognitive distortions as an explanation for offending behavior
Cognitive distortion is thinking that has a bias, such as that what is perceived by a person does not match reality.
Examples of CD:
Hostile Attribution bias: When a person automatically attributes malicious intentions to another.
Minimalisation: Underplaying the consequence of an action to reduce negative emotions such as feeling guilty.
Evidence link CD with violent behaviour.
Evaluate Cognitive distortions as an explanation for offending behavior
- Schonenberg & Aiste (2014) - showed emotionally ambiguous faces to 55 violent offenders & compared their responses to control non-offender pps. F: Violent offenders were significantly more likely to perceive the faces as angry & hostile.
- Dodge & Frame: showed children a video clip of ambiguous, provocative situations in which the behaviour was neither hostile nor random. Before the study, the children who were classified as aggressive perceived the video clip as more aggressive overall than those who were classified as nonaggressive. Suggests cognitive bias’s stem from childhood & that individuals feel like they can justify being ant-social or committing offences because they feel victimised or outcasts anyway.
- Real world application - Heller et al used CBT to reduce cognitive distortions. PPs who attended 13 one-hour sessions had a 44% reduction in arrests compared to control. CBT may be effective for rehabilitation & is the most used treatment for sex offenders.
- Research support for minimalisation: Barbaree from 26 incarcerated rapists: 54% denied committing an offence at all. 40% minimised the harm to the victim. Pollock & Hashmall: 35% of a sample of child molesters described their crime as non-sexual. 36% state the victim had consented.
- Counterpoints: Strong focus o violent offenders & sexual offenders doesn’t explain all types of crime.
Outline Kohlberg’s theory of moral reasoning
Kohlberg interviewed boys & men about the reasons for their moral decisions and constructed a stage theory of moral development:
Level 1:
Pre-Conventional morality - egocentric view, the level most criminals are classified.
Stage 1: Obedience & punishment: behaviours driven by avoiding punishment & gaining rewards. Less mature, more child-like reasoning.
Stage 2: Individual interest: Behaviour driven by self interests & rewards.
Level 2:
Conventional morality
Stage 3: interpersonal - behaviour driven by social influence
Stage 4: Authority - behaviour driven by obeying authority & conforming to social order.
Level 3:
Post-Conventional morality
Stage 5: Social contracts - behaviour driven by balance of social order & individual rights.
Stage 6: Universal ethics - behaviour driven by internal moral principles.
Criminals are likely to be at the pre-conventional level (Hollin et al)
Evaluate Kohlberg’s theory of moral reasoning
- Gudjonsson & Sigurdson - studied 128 male juvenile offenders. F: 38% did not consider the consequences of their actions & 36% were confident they would not be caught. Suggests they were in Kohlberg’s pre-conventional stage.
- Chen & Howitt - Assessed 330 male adolescents (12-18). Offenders who showed more advanced moral reasoning were less likely to be involved in violent crimes.
- Gender Bias: Kohlberg’s sample was American men & he used male-orientated principles, which he argued were universal (beta-bias). When he studies females with the same principles he concluded that they were less morally developed than men (alpha bias). Gilligan argued that females take a care orientated approach towards morality, whereas males take a justice approach.
- Real world Applications: Kohlberg observed that children raised in Israeli Kibbutzim were morally more advanced that those not raised on Kibbutzim & used this to set up a number of cluster schools (‘communities’) in a number of schools and a prison. Member has the power to define and resolve disputes within the group, encouraging moral development.
Outline differential association theory as an explanation for offending behaviour
- Sutherland suggested that offending behaviour can be explained in terms of social learning. Interactions with others lead to the formation of attitudes about crime (which may be more or less favourable), as well as acquiring specific knowledge about how to commit crimes.
- Individuals learn attitudes (i.e pro-crime), values (i.e. deviant behaviours), techniques (i.e. fighting) and motivations from interactions with those around them.
- Attitudes & behaviours are learnt from Intimate personal groups such as family & peers, and/or local community.
- Sutherland suggested that the frequency, length and personal meaning of such social associations will determine the degree of influence.
- Learning is likely to occur through direct & indirect operant conditioning
Evaluate differential association theory as an explanation for offending behaviour
- Research support: Farrington studied delinquent development using a longitudinal studies on 411 males from 8yrs-50yrs, from working-class deprives inner-city South London. Data gained from officially recorded convictions & self-reports. F: Key predictors of crime at age 8-10 = family criminality, daring/risk taking, low school attainment, poverty & poor parenting. 41% convicted of at least 1 offence between 10-50yrs. CP: Gender & culture bias. Doesn’t explain the 59% who didn’t offend.
- High concordance validity - Osborn & West: 13% of the sons of the non criminal fathers had criminal convictions, compared with 40% of the sons of criminal fathers. that criminality appears to run in families however findings can also be explained in terms of genetics.
- Major contribution: shift from blaming individuals to social factors. Learning environments can be changed, whereas genes cannot. School used to educate on anti-crime values & promotes rehabilitation.
- Scially Sensitive: Encourages prejudices & stereotyping against ppls from high crime, working class areas or with a family history of crime. Different treatment based on stereotypes may create a self-fulfilling prophecy, encouraging crime.
- Challenges prison system: DA would suggest that prisons are not the best place for young offenders as it surround them with delinquent peers encouraging re-offending. Supported by statistics Over time, the UK overall reoffending rate has fluctuated between 23% and 32%.
- The role of Biological Factors: diathesis stress & niche picking.
Outline the psychodynamic explanation for offending: The superego
Blackburn proposed that when conflict in the phallic stage is not resoved, the superego doesn’t develop properly and he suggested that parents have the biggest impact on the development of the child’s supergeo:
Weak/underdeveloped super-ego: An absent or weak same-gender parent means that there is nobody to identify with & therefore results in an underdeveloped super-ego (Females all fall into this). Results in immoral or unctonrolled violent urges & Impulsivity.
Harsh/Overdeveloped Super-egeo: An overly strict parent will lead to excessive feelings of guilt, racked with anxiety & rigid moral values. They feel the need to be punished. Could lead to someone committing crimes in order to seek punishment & relieve guilt.
Deviant super-ego: If the same-sex parent is a criminal then the child who identifies with their parent will adopt the same devaint superego. Results in lack of guilt or consequence normally associated with crime.
Outline the psychodynamic approach for offending: Maternal deprivation
Bowlby proposed that prolonged seperation between a mother and a child with no substitute primary carer would have long-term emotional consequences including affectionless psychopathy.
Affectionless psychopathy: A behaviour disorder in which the individual has no ability to experience shame or guilt and lacks a social conscience. This means that they may find it ‘easier’ to commit crimes. Characteristics: lack of affection for others, lack guilt, don’t fear consequences for action, lower IQ, lack of empathy, impulsive, lack of care for others.
44 Juvenille Thieves Study:
Interviews with thieves & families: 14/44 = affectionless psychopaths - 12 of this 14 experienced maternal deprivation. In a non-criminal group, only 2 had experienced early seperation.