Forensic Psychology Flashcards
What is offender profiling
An investigative tool employed by the police when solving crimes, main aim of which is to narrow likely suspect list, profilers help police in murder cases
How does offender profiling work
Methods vary but usually involves scrutiny of crime scene and analysis of evidence in order to generate hypothesis about probable characteristics of the offender
What is the top down approach
American approach used by FBI, FBI behavioural scientists gathered in depth interviews with 36 sexually motivated murders including Bundy and Manson. Concluded data could be categorised into organised and disorganised crimes
What is organised disorganised distinction based on
Idea that serous offenders have a modus operandi and this correlates with social and psychological characteristics that relate to individual
What are organised offenders
Planned crime in advanced, victim is deliberately targeted and they have a type. They maintain high degree of control, little evidence left behind, above average intelligence, skilled professional occupation, socially and sexually competent, married with kids
What is a disorganised offender
Little evidence of planning, spontaneous, body left at scene and little control, lower IQ, unskilled or unemployed, history of sexual dysfunction and failed relationships, live alone close to offence
What are the 4 main stages in conducting FBI profile
1.data assimilation-profiler reviews crime scene photos, pathology and witness reports 2.crime scene declassification-organised to disorganised 3.crime reconstruction-hypothesis of sequenced events 4.profile generation- hypothesis related to likely offenders
What is a strength of top down approach
Support for organised offenders. Canter tested organised disorganised typology of 100 murders committed by different serial killers. Used analysis called smallest space analysis-statistical technique identifies correlations across different samples of behaviour. Analysis used to assess co-occurrence of 39 serial killing aspects including torture, restraint, conceal body, weapon used and cause of death. Analysis revealed a subset of features that many serial killers matched organised typology. Suggests key component to FBI typology has validity
What is counterpoint of top down approach
Many studies show organised disorganised aren’t mutually exclusive. Variety of combinations that occur at any given murder scene. Eg. Godwin argues it’s difficult to class serial killers as one or other type. Killer may have high IQ and sexual competence but commits spontaneous murder. Suggests organised disorganised typology is more of a continuum
What is another strength of top down approach
Can be adapted to other crimes like burglary. Meketa reports top down profiling been applied to burglary and seen 85% rise in solved cases. Detection method uses organised disorganised typology but also adds interpersonal (knows victim), opportunistic (inexperienced young offender). Suggests top down profiling has wide application
What is a limitation of top down approach
Based on flawed evidence. Developed using interviews with 36 murders in US, 25 who were serial killers. 24 individual classified as organised and 12 disorganised. Canter et al argued sample was poor as it wasn’t random or large sample of varied crimes. No standard set of interview questions either so not comparable. Suggests top down doesn’t have scientific basis
What is the aim of bottom up approach
Generate picture of offender, their likely characteristics, routine behaviour and social background through systematic analysis of crime scene evidence, profile is data driven as profiler goes into greater detail of crime scene details
What is investigative psychology
Attempt to apply statistical procedures, with psychological theory to the analysis of crime scene evidence
What is aim of investigative psychology
Establish patterns of behaviour that are likely to occur across crime scenes to develop a statistical database which then acts as baseline for comparison, specific details of crime can then be matched against to reveal important details about offenders history and family background and determines if series of events committed by 1 person
What are 3 elements to investigate psychology
Interpersonal coherence, significance of place and time, forensic awareness
What is interpersonal coherence
Way offender behaves at scene, interact with victim, eg. If rapist humiliated victim or was apologetic may explain how they relate to women
What is significance of time and place
May indicate where offender is living
What is forensic awareness
Individuals who have been subject of police interrogation before, their behaviour may suggests how Careful they are to cover their tracks
What is geographical profiling
Uses info about location of linked crime scenes to make inferences about home/operation base of offender (crime mapping) and based on principle of spatial consistency (people commit crimes in limited geographical space). Creates hypothese of offenders modus operandi and thinking
WhT are geographical profiling assumptions
Serial killers restrict their work to familiar geographical areas and so spatial pattern provide profilers with centre of gravity including offenders base
How is geographical profiling the basis of canters circle theory
Pattern of offending forms a circle around offenders home base
What are the 2 ways geographical profiling describes offenders
Marauder(operates close to their home), commuter (travelled from their usual residence)
What can spatial decision making offer
Investigative team insight into nature of offence, planned or opportunistic, mental maps, mode of transport, employment status and age
Strength of bottom up approach
Support for investigative psychology. Canter and Heritage conducted analysis of 66 sexual assaults using smallest space analysis. Several behaviours identified as common in different samples like use of impersonal language and lack of reaction to victim. Can help establish if crime committed by same/different person. Supports basic principle of investigative psychology that people consistent in behaviour
What is counterpoint of bottom up approach
Case linkage depends on database and only consists of historical crimes which have been solved. They were solved so maybe they were straightforward to link crimes in first place making circular argument. Suggests investigative psychology tells us little about crimes that have few links and remain unsolved
What is another strength of bottom up approach
Evidence to support geographical profiling. Lundigan and Canter got info from 120 serial killing murder cases using small space analysis it revealed spatial consistency in killers behaviour. Location of each body site created centre of gravity as offender goes different direction each time crime committed. Offenders base can be located in centre of all crime scenes, effect more noticeable for marauders. Supports view that geographical info can be used to identify offenders
What is limitation of bottom up approach
Geographical profiling may not be sufficient on its own. Same for investigative psychology, success of geographical profiling reliant on quality of data that police provide. Recording of crime not always accurate, can vary between police forces and 75% crimes not even reported to police. So even if info correct other factors may be more important in building a profile like timing of offence and age/experience of offender. Suggests geographical info alone doesn’t always lead to successful capture of offender
Who was Eysenck
Important figure in personality and intelligence research, proposed behaviour represented along 2 dimensions
What were Eysenck 2 dimensions and what was the 3rd added later
Introversion-extraversion(E), neuroticism-stability(N), they combine to form variety of personality traits, later added psychoticism-sociability(P)
What is Eysenck say about our personality traits
They are biological in origin and come through type of nervous system we inherit, so all personality types including criminal ones have biological basis
What are extraverts
Have an underactive nervous system so constantly seek excitement, stimulation and engage in risk taking activities, don’t condition easily so don’t learn from their mistakes
What is neurotic
Individuals have high levels of reactivity in sympathetic nervous system, they respond quickly to situations of threat meaning they’re nervous, jumpy and overanxious and instability means behaviour difficult to predict
What is a psychotic person
Have higher levels of testosterone, unemotional and prone to aggression
What is the criminal personality in Eysenck theory
Type of neurotic-extravert-psychotic. Neurotics are unstable and prone to overreact in threat situations, extraverts seek more arousal so engage in dangerous activities. Psychotics are aggressive and lack empathy
What did Eysenck say socialisation processes were
The link between personality and offending behaviour
How did Eysenck see offending behaviour
Developmentally immature, selfish and concerned with Immediate gratification, offenders impatient and can’t wait for things
What is the process of socialisation
Children taught to be able to delay gratification and be more socially orientated
What did Eysenck believe people with high E and N scores had
Hard nervous systems to condition so they are less likely to learn anxiety responses to antisocial impulses and more likely to act antisocial in situations where opportunity presents itself