Forensics Flashcards
The Top down profiling approach was devised by who?
FBI in the USA
What are the characteristics of an organised offender?
Planned, target victim, high degree of control over crime, little or no clues left at crime scene, socially and sexually competent, higher than average IQ, , skilled or professional occupation, married and may have children.
What are the 4 stages of constructing an FBI profile?
Data assimilation, crime scene classification, crime reconstruction, profile generation.
Outline a strength of the top-down approach
Canter research on serial killers shows FBI typology has validity
Who concluded that organised and disorganised were more of a continuum?
Godwin
Name three characteristics of the bottom up approach to offender profiling
Data driven, profile emerges from anaylsis of crime scene, investigative psychology, geographical profiling
What is an offender called who operates close to their operational base called?
Marauder
Which country uses the bottom up offender profiing approach
UK
What is investigative psychology?
Using stastical procedures, alongside psychological theory to analyse the crime scene evidence.
What is interpersonal coherence?
The way an offender behaves at the scene, including how they interact with the victim.
What is forensic awareness?
People who have been the subject of police interrogation before, may be mindful of how to ‘cover their tracks’.
Outline a strength of the bottom up approach to offender profiling
- Cater’s research on 66 sexual assaults using the smallest space analysis support the principles of investigative psychology and that people are consistent with their behaviour. 2. Canters research also supports geographical profiling and the centre of gravity.
Outline geographical profiling
A form of bottom up profiling based on the principle of spatial consistency, that an offenders operational base and possible future offences are revealed by geographical location of their previos crimes.
Outline a limitation of the bottom up approach to offender profiling
- Linkage of cases depends on the amount of data in the database (smallest space). 2. Geographical profiling alone is not enough to always led to successful capture of an offender. 3. There are mixed results from police forces as to how helpful the profiling is.
Lombroso’s historical biological approach thought that criminals were genetic what?
Throwbacks
Name some physical features of murderers according to the Atavistic theory
Bloodshot eyes, curly hair and long ears
What percentage of crimes did Lombroso’s study claim could be accounted for by atavistic characteristics?
40%
Why was Goring’s study an improvement on Lombroso’s?
It had a control group
In the biological approach the degree of similarity between twin pairs and family members on a specific characteristic is called what?
Concordance
Individuals with antisocial personality disorder may have reduced activity in which area of the brain?
The prefrontal cortex
In the Mednick study, when both biological and adoptive parents had convictions what was the % of adoptees that had convictions?
24.5%
A variant of which gene is linked to serotonin in the neural explanation of offending behaviour?
MAOA
In Eysenck’s theory he suggested that the criminal type would score highly on measures of what?
Extraversion, Neuroticism and Psychoticism
Name a behaviour that is associated with extraverts
seek excitement and stimulation, engage in risk taking behaviour, not easy to condition
How would you describe an extraverts nervous system?
Their nervous system (RAS) is underactive.
How did Farringon find that offenders scored on the EPQ? And is this a strength or weakness or Eysencks theory.
High on measures on P but not for E or N, therefore it’s a weakness of the theory.
Outline a strength of Eysenck’s theory of the criminal personality
Eysencks own research on 2070 prisoners and 2422 controls, taking the EPQ showed that offenders did score higher than the controls on E,N and P.
Outline a limitation of Eysenck’s theory of the criminal personality
- That offending behaviour can be explained by personlaity traits alone, Moffitt showed it was more about an interaction with the environment and personality. 2. Farringtons research showed offenders had high rates of P but not E or N. 3. Bartol and Holanchock showed cultural issues with the theory, Hispanic and African American offenders scored low on Extraversion.