Forensic Psychology Flashcards
Offender Profiling- Top-Down Approach- AO1
- Offender profiling=behavioural+analytical tool help investigators predict and profile characteristics unknown offenders
- Top-down=FBI / interviews sexually motivated murderers
=starting with pre-established typology and working down to assign offenders as organised/disorganised - Organised offender=evidence of planning / has M.O / socially and sexually competent / higher IQ
- Disorganised offender=little evidence of planning / leaves clues at scene / socially and sexually incompetent / lower IQ
- Constructing FBI profile
Data assimilation=review evidence
Crime scene classification=organised/disorganised
Crime reconstruction=hypotheses
Profile generation
Offender Profiling- Top-Down Approach- AO3
- Research support +
Canter=analysis 100 US murders
Smallest space analysis=correlations across samples of behaviour
Found subset of features of serial killings matched FBI’s typology for organised offenders
Increased validity - Wider application +
Meketa=top-down applied burglary=85% rise in solved cases in 3 US states
Uses organised/disorganised distinction but adds impersonal and opportunistic categories - Flawed evidence -
FBI profiling=36 murder interviews- 25 serial killers, 11 single/double murder
24 organised / 12 disorganised
Canter=poor sample- not random, large or different kinds offender
Not standardised and not comparable
Not sound, scientific basis
Offender Profiling- Bottom-Up Approach- AO1
- Bottom-up=Profilers work up from evidence collected from scene to develop hypotheses about characteristics, motivation, background
- Investigative psychology=matches details from crime scene with statistical analysis of offender behaviour patterns on database
Comparison / committed by same person
=interpersonal coherence- interaction with victim=same as everyday life
=significance time and place- where offender living
=forensic awareness - Geographical profiling=crime mapping of home of offender- spatial consistency- centre of gravity=future offences by geographical locations of previous crimes- Canter’s circle theory
=marauder- operates in close proximity to home base
=commuter- travelled distance from usual residence
Offender Profiling- Bottom-Up Approach- AO3
- Evidence for investigative psychology +
Canter+Heritage=analysis 66 sexual assault using smallest space analysis
Behaviours=common in different samples behaviour
Characteristic pattern=whether more offences committed by same person
People consistent in behaviour - Evidence for geographical profiling +
Lundrigan+Canter=collated 120 murder cases
Smallest space analysis revealed spatial consistency
Body disposal site=centre of gravity- creating circular effect around home base=middle of pattern
More noticeable for marauders - Geographical information insufficient -
Success reliant on quality of data police provide
75% crimes not reported
Questions utility of approach as relies on accuracy of geographical data
Other factors just as important in creating profile
Biological Explanations- Historical Approach (Atavistic Form)- AO1
- Historical approach=Lombroso
Criminals=genetic throwbacks- primitive subspecies biologically different non-criminals - Biological approach=offenders lacked evolutionary development and would turn to crime
Offending behaviour=rooted in genes (innate)- offender not to blame for actions - Atavistic form=offender subtype identified by physiological markers- features of face and head
=cranial- narrow brow / strong jaw / facial asymmetry / dark skin
Insensitivity to pain / tattoos / unemployment - Offender types
=murderers- bloodshot eyes / curly hair / long ears
=sexual deviants- glinting eyes / fleshy lips / large ears - Lombroso’s research
383 dead convicts / 3839 living ones
40% criminal acts=people with atavistic characteristics
Biological Explanations- Historical Approach (Atavistic Form)- AO3
- Lombroso’s legacy +
Lombroso=father of modern criminology
Shifting away moralistic discourse to scientific
Theory heralded beginning of offender profiling - Contradictory evidence -
Goring=anything physically atypical about offenders
3000 offenders and non-offenders=no evidence offenders have particular facial/cranial structures - Poor control -
Failed to control variables
Did not compare with control group=could have accounted for confounding variables
Research=links between crime and social conditions
Research does not meet modern scientific standards
Biological Explanations- Genetic- AO1
- Genetic explanation=offenders inherit gene/combo of genes that predispose to commit crime
- Twin and adoption studies
Christiansen=concordance offender behaviour in 35% MZ and 13% DZ
Checked against police records=underlying traits also inherited
Crowe=bio mother criminal record=50% same thing by 18 - Candidate genes
Tiihonen=MAOA and CDH13=violent crime
MAOA=regulates serotonin- aggressive behaviour
CDH13=substance abuse
5-10% violent crime due to these genes - Diathesis-stress model=combination of genetic predisposition and bio/psycho trigger=offending behaviour
Biological Explanations- Genetic- AO3
- Issues with twin evidence -
Assumed environment same as twins brought up together
Shared environment assumption=MZ more than DZ as look identical so treated more similarly
Higher concordance rates as treated more similar - Support for diathesis-stress +
Mednick=neither bio/adoptee parents criminals=13.5% adoptees that did
Rose to 20% when either bio parent had conviction
24.5% when adoptive and bio had conviction
Biological Explanations- Neural- AO1
- Neural differences involved those with antisocial personality disorder(APD)=reduced emotion, lack of empathy, characterises convicted offenders
- Prefrontal cortex=Raine- APD brain
APD=reduced prefrontal cortex activity (regulates emotional behaviour)
11% reduction volume grey matter in APD prefrontal cortex - Mirror neurons
Keysers=only when asked to empathise did their empathy reaction activate (controlled by mirror neurons)
APD not without empathy but neural switch, unlike atypical brain where empathy switched permanently on
Biological Explanations- Neural- AO3
- Brain evidence +
Kandel+Freed=frontal lobe damage(planning behaviour) and antisocial behaviour
Damage=impulsive, emotional instability and inability to learn from mistakes - Intervening variables -
Farrington=men scored high psychopathy- risk factors in childhood
Early childhood experiences=APD and neural differences associated with it
May be other variables that have impact on the complex process
Psychological Explanations- Eysenck’s Theory- AO1
- Personality theory=3 dimensions- introversion-extraversion / neuroticism-stability / psychoticism-sociability
- Biological basis=type of nervous system we inherit- offenders=high NEP
Extravert=stimulation, risk-taking
Neurotic=high reactivity, jumpy, hard to predict
Psychotic=high testosterone, unemotional, aggressive - Socialisation- offenders developmentally immature, selfish, immediate gratification
- Eysenck personality questionnaire (EPQ) measured criminal personality
Psychological Explanations- Eysenck’s Theory- AO3
- Research support +
Eysenck+Eysenck=prisoners scores EPQ with controls
NEP over all ages=prisoners higher scores than controls
Offenders rate higher across 3 dimensions - Too simplistic -
Moffitt=offending behaviour in adulthood and adolescence
Personality=poor predictor how long offending occurs
Persistence in offending behaviour=reciprocal process between personality and environmental reactions to this - Cultural factors -
Bartol+Holanchock=hispanic and afrian-american offenders in max security
6 groups based on history and nature of offences
All groups=less extravert than control due to different cultural group than Eysenck
Psychological Explanations- Cognitive- Level of Moral Reasoning- AO1
- Kohlberg- decisions based on what believe to be right/wrong
- Stages of moral reasoning:
Level 1=pre-conventional morality
Stage 1-punishment orientation
Stage 2-Instrumental orientation
Level 2=conventional morality
Stage 3-good boy/girl orientation
Stage 4-maintenance of social order
Level 3=post-conventional morality
Stage 5-morality of contract and individual rights
Stage 6-morality of conscience
=offenders have lower level moral reasoning than non-offenders - Link with criminality
Offenders more likely pre-conventional=avoid punishment and gain rewards
Supported=offenders more egocentric, non-offenders more honest, generous and non-violent
Psychological Explanations- Cognitive- Level of Moral Reasoning- AO3
- Research support +
Palmer+Hollin=moral reasoning offenders and non-offenders using 11 moral dilemma questions
Offender group=less mature moral reasoning- consistent with Kohlberg’s predictions - Type of offence -
Thornton+Reid=financial gain crimes=more pre-conventional moral reasoning than impulse crimes
Pre-conventional=offenders believe good chance evading punishment
Theory doesn’t apply to all crime
Psychological Explanations- Cognitive- Cognitive Distortions- AO1
- Cognitive distortions=faulty, biased, irrational ways of thinking=perceive ourselves, others world inaccurately
- Hostile attribution bias=tendency judge ambiguous situations as aggressive when may not be
Schonenberg+Justye=images ambiguous facial expressions- violent offenders perceived as hostile
Dodge+Frame=children ambiguous provocation clip- identified as aggressive=situation more hostile - Minimalisation=type deception downplaying significance event/emotion- strategy dealing with guilt
Barbaree=26 rapists- 54% denied offence, 40% minimised harm caused to victim