Forensic Psychology Flashcards
What is offender profiling?
Offender Profiling is a behavioural and analytical tool that helps investigators predict and profile the characteristics of unknown offenders
What are the two types of offender profiles?
Two types of offender profiles:
-Top-Down
-Bottom-Up
What is top-down profiling?
Top-Down Profiling:
-American Approach (adopted by the FBI)
-Creates a profile of an offender that allows us to predict the type of offender that commited the crime
-Organised or Disorganised offenders
What is top-down profiling based on?
Top-Down profiling is based on data gathered from interviews with 36 sexually-motivated killlers, such as Ted Bundy
What are the characteristics of an organised offender?
Characteristics of an organised offender:
-Shows evidence of planning
-Victim is deliberately targeted
-Maintains high level of control - leaves little amounts of evidence
-Above average intelligence and stable career
-Often married and with children
What are the characteristics of a disorganised offender?
Disorganised offender:
-Spontaneous offences
-Weapon and body usually left at scene - little control
-Lower than average IQ
-Unskilled employment
-Failed relationships, lives alone
-Residence tends to be close to the crime scene
How to construct an FBI profile?
Constructing an FBI profile:
1). Data assimilation (evidence is reviewed)
2). Crime scene classification (organised/disorganised)
3). Crime reconstruction
4). Profile generation
Top-Down approach to offender profiling evaluation
Top-Down approach to offender profiling evaluation:
- = Reductionist -> classification system too simplistic -> offenders may overlap
- = Simplistic -> applies to particular crimes -> based on sexually-motivated offences
- = Temporal validity low -> based on an outdated model
+ = Research support -> Caner’s metal analysis
+ = Real-world application -> Arthur Shawcross profiled enough that he was found at the crime scene -> however it is idiographic
What is the bototm-up approach to offender profiling?
Bottom-up approach to offender profiling:
-Generates a picture of the offender through systematic analysis of the evidence at the crime scene
->British model
-Does not begin with fixed topologies
Types of bottom-up profiling
Types of bottom-up profiling:
-Investigative psychology
-Geographical mapping
What is investigative psychology?
Investigative psychology:
-Aims to establish patterns of offending behaviour likely to happen
-Helps develop the statistical database
Assumptions of investigate psychology
Assumptions of investigate psychology:
-Interpersonal coherence (consistency between the way offenders interact with their victims)
-Time and place (time and location communicate
-Criminal characteristics (characteristics about the offender helps classify them)
What is geographical profiling?
Geographical profiling -> known as crime mapping -> uses location of crime to infer residence
-Canter’s circle theory: idea that serial offenders restricts offences to where they are familiar - forms circle around home base
-Marauder / Commuter
What is the marauder as stated by Canter?
The marauder - operates in close proximity to their home base
What is the commuter as stated by Canter?
The commuter = who is likely to have travelled a distance form their home base to commit their crimes
Bottom-Up approach to offender profiling evaluation
Bottom-Up approach to offender profiling evaluation:
+ = Scientific and empirical measurement of crime -> makes use of statistical analysis -> objective
+ = Research Support (Canter)
- = Unsucessful utilisation -> Copson -> only 3% of cases led to the correct identification of an offender
Canter’s meta-analysis study
Canter’s meta-analysis study:
-Analysis of 66 sexual assault cases
-Examined data using smallest space analysis
-Behaviours were found common across offences -> ‘case linkage’
Outline the historical approach to forensic psychology
Historical approach:
-Biological basis to behaviour - innate tendencies determined by genes
-Developed by Lombroso (1876)
What were the characteristics proposed by Lombroso for criminal behaviour?
Characteristics proposed by Lombroso for criminal behaviour:
-Narrow, sloping brow
-Prominent jaw
-High cheekbones
-Facial asymmetry
-Dark skin
-Physical irregularities (ie extra toes/fingers)
Lambroso’s research
Lambroso’s research:
-Studied heads and faces of convicts in Native Italy
-Used 383 dead and 3839 living criminals
-40% accounted for by atavistic characteristics
Lambroso’s research evaluation
Lambroso’s research evaluation:
- = Racial stereotypes -> Atavistic features mostly included African descent - = Contradictory research -> Goring compared criminals with non-criminals and found no particular characteristics
- = Lack of control group -> didn’t control confounding variables ie psychological disorders
+ = Contribution to criminology -> introduced the scientific approach
The genetic explanation of criminal behaviours
The genetic explanation of criminal behaviours:
-Suggests particular genes are involved
-Candidate genes
-Diathesis-Stress modeo