Unit 3: Forensic Psychology Flashcards
Cultural issues of defining crime :
what is considered crime in one culture may not be judged as such in another
Historical issues in defining crime :
definitions of crime change over time
What are the three methods used to measure crime rates :
- official statistics
- victim surveys
- offender surveys
What are official statistics ?
figures based on numbers of crimes reported and recorded by the police which are often used by the government to inform crime prevention strategies
What are victim surveys ?
a questionnaire that asked a sample of people which crimes have been committed against them over a fixed period of time and whether or not they have been reported to the police
What are offender surveys ?
a self-report method that requires people to record the number and type of crime they have committed over a specified period of time
Criticism of official statistics :
- unreliable - significantly underestimate the true extent of crime. Only around 25% of crime is recorded in official figures. Many reasons one being police recording rules and police priorities distorting official figures
Support of victim surveys :
+ greater degree of accuracy
Criticism of victim surveys :
- they rely on respondents having accurate recall of the crimes they have been a victim of - Telescoping may occur when victims misremember events as happening in the past year when they didnt - this will distort figures
Support for offender surveys :
+ provides insight into how many people are responsible for certain offences
Criticism for offender surveys :
although confidentiality is assured responses may be unreliable as offenders may want to conceal or over exaggerate actions
Criticism for the ways of measuring crime :
- multidisciplinary approach
researchers advocate this approach when measuring crime: a combination of all available methods provides the best insight into the true extent of the offending
What is offender profiling ?
a behavioural and analytical tool that is intended to help investigators accurately predict and profile the characteristics of unknown criminals
Whats the top-down approach also known as ?
the typology approach
What is the top-down approach ?
profilers start with a pre-established typology and work down in order to assign offenders to one of two categories based on witness accounts and evidence from the crime scene
What are characteristics of a organised offender ?
an offender who shows evidence of planning, targets the victim and tends to be socially and sexually competent with higher than average intelligence
What are characteristics of a disorganised offender ?
shows little evidence of planning, leaves clues and tends to be socially and sexually incompetent with lower than average IQ
What are the 4 main stages in conducting an FBI profile
- data assimilation - reviews evidence
- crime scene classification - organised or disorganised?
- crime reconstruction - hypothesis in terms of sequence of events, behaviour of victim etc
- profile generation - hypothesis related to the likely offender
Where is the top-down approach from ?
America ( used by the FBI )
Criticisms of the top-down approach:
- top-down profiling is better suited to crime scenes that reveal more detail about the suspect e.g rape, arson and cult killings. More common offences such as burglary do not lend themselves to profiling as the crime scenes reveal very little about the offender - limited approach to identifying a criminal
- to simplistic
behaviours that describe each disorganised and organised arent mutually exclusive - a variety of combinations could occur at a murder scene. Keppel and Walters (1999) focus more on different motivations killers might have rather than trying to determine specific types - the typology approach was developed using interviews with 36 killers in the US - 25 were serial and 11 single or double. small and unrepresentative sample to base a system which may have significant influence on the nature of the police investigation. Canter also argued its not sensible to rely on self-report data when dealing with convicted killers
Who created the bottom-up approach ?
Britain
What is the bottom-up approach ?
profilers work up from evidence collected from the crime scene to develop a hypothesis on the likely characteristics, motivations and social background of the offender
What is investigative psychology ?
a form of bottom-up profiling that matches details from the crime scene with statistical analysis of typical offender behaviour patterns based on psychological theory
What is 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 about by the geographical location of the previous crimes