Paper 3 - Forensic Psychology Flashcards
(135 cards)
What is offender profiling?
An investigative technique that produces a description of the characteristics of an offender based on the crime scene and other data to help narrow down the list of suspects
What is the top down approach?
This approach has a preexisting typology or category through which they see the crime scene, these pre existing typologies categorise offenders into two types: Organised vs Disorganised
How were the categories for the top down approach created
They came up with these categories from interviews with 36 convicted serial sexual murderers, they established that behavioural characteristics can be pre-determined from evidence at a crime scene
What are some crime scene behaviours of organised offenders?
- Weapon Absent
- No blood
- Use of restraints
- Victim was a stranger
- Planned offence
- Controlled conversation
What are some personality characteristics of organised offenders?
- High IQ
- Socially and sexually competent
- Skilled work
- Living with partner
What are some crime scene behaviours of disorganised offenders?
- Spontaneous offence
- Minimal use of constraints
- Minimal conversation
- Body left in view
- Weapon often present
- Victim/location known
What are some personality characteristics of a disorganised offender?
- Below average IQ
- Socially and sexually incompetent
- Unskilled work
- Living alone
What is a limitation of the top down approach (research against its effectiveness)
David Canter et al (2004)
Tested the typology with 100 serial killings in the USA
Found no distinct pattern in the data for organised vs disorganised murderer
This questions the accuracy of the typologies and suggests alternative methods are needed
What is a limitation of the top down approach regardings its origins?
Based on interviews on 36 convicted sexual murderers (small
sample so hard to generalise)
Can only generalise to sexually motivated killers.
Only American men (culture and gender bias)
Self report data from serial killers
What are 2 comparisons of the top down approach and the bottom up approach
Top down is limited to one type of crime
Bottom up is based of psychological theory such as interpersonal coherence, schemas and statistical analysis.
What is a strength of the top down approach?
The advantages of the top-down approach include its ability to quickly narrow down a list of suspects based on their characteristics and behaviour, as well as its potential to predict future criminal behavior.
Additionally, it can be a useful tool in investigations where little physical evidence is available
What is the bottom up approach?
Does not assume a fixed typology, it starts with the details of the crime and works up to build an understanding of the offender from there. Through a process called investigative psychology as well as geographical profiling
What is investigative psychology?
This uses psychological theory and statistics to analyse crime scene evidence and generate a database of criminal behaviour patterns.
Requires a statistical database which records details about crimes, allowing to identify patterns that occur across crime scenes
What is interpersonal coherence?
The idea that the way the offender behaved at the crime scene will be consistent with how they behave in everyday life
What is schema theory related to criminals?
It assumes that criminals will have schemas of how to function, carry out their job, get around a town or interact and talk with other people.
What is geographical profiling
The study of spatial behaviour in relation to crime and offenders, also known as crime mapping. Uses crime scene information and local knowledge to allow inferences about where the offender lives, works and operates.
What is circle theory in geographical profiling?
The idea that offenders tend to commit crimes within a limited spatial area that goes out from where they live. Allow for a centre of gravity to be identified as to where the offender lives.
What are differences between marauders and commuters?
-Marauders - Where they have a home base location that they commit crimes from.
Commuters – They have travelled a distance away from their home base
What is a strength of the bottom up approach (supporting example)
John Duffy
Police identified 24 sexual attacks and 3 murders in North London but were struggling to find the murderer. They brought in David Canter to help.
Used both investigative psychology techniques and geographical profiling to come up with a profile of the suspected characteristics of the perpetrator.
This led them to arrest John Duffy, who was previously 1505th on a list of suspects, but the bottom up approach really narrowed down the list of suspects.
What is a limitation of the bottom up approach (when it went wrong)
Rachel Nickel
Caution is needed in profiling as it has the potential to mislead
Stabbed to death in 2002 with her 2-year-old son with her in a park.
The media attention of the case led the police desperately trying to find a murderer, so they brought in forensic psychologist Paul Britton.
Profile eventually led to the arrest of Colin Stagg (undercover work) and as they were so focused on the profile and ignoring the possibility of potential other suspects
The real criminal went on to commit another murder: Robert Napper
What do the biological explanations to offending suggest?
The biological explanations assume that crime is an innate tendency which may be genetically determined or the result of abnormalities in brain structure or function
What did Lombroso suggest?
Lombroso’s (1876) theory of criminology suggests that criminality is inherited and that someone “born criminal” could be identified by the way they look.
What was Lombroso’s idea of genetic throwbacks
Lombroso suggests that criminals are ‘genetic throwbacks’ – a primitive subspecies who were biologically different to non-criminals.
Offenders were seen by Lombroso as lacking evolutionary development.
]Their savage and untamed nature meant that they could not be conditioned and found it impossible to fit into and adjust to the demands of civilized society and so would inevitably turn to crime
What were the physiological markers which accounted for the atavistic form?
Large jaw, forward projection of jaw
Low sloping foreheads
High cheekbones
Flattened or upturned nose