Forensic Psychology Flashcards
Crime
Breaking the rules of a state
Deviance
Breaking societal norms and values
Cultural issues defining crime
Certain behaviours are treated as criminal offences in different countries but not in others. Also, forensic research is often ethnocentric.
Historical issues defining crime
Crimes change over time, and things become legal as society develops.
Top-down approach
Developed by the FBI Behavioural Science Unit from date gathered from 36 sexually motivated serial killer cases. The data is reviewed, the crime scene is classified and potentially reconstructed. They then generate a profile of likely characteristics.
Organised crime scene
Planned, clean crime scene, no/ very few clues, targeted victim, attempts to control the victim.
Organised criminal
Above average IQ, socially/ sexually competent, married, anger or depression at the time of the offence, follows media coverage, skilled occupation.
Disorganised crime scene
Little planning, lots of evidence, minimal use of constraint, random/ disorganised behaviour.
Disorganised criminal
Lives alone near the scene, sexually/ socially inadequate, unskilled or unemployed, physically/ sexually abused, frightened or confused at the time of the attack.
Top-down approach evalutation
- Can only be applied to sexually motivated serial killers.
- Alison et al 2002- approach is based on outdated theories of personality being stable.
- Reductionist- classification system is too simple- not every offender is organised or disorganised.
Bottom-up approach
Canter (1990)- starts with the details to build the bigger picture. The approach uses the Smallest Space Analysis Database to identify patterns with the offence and other offences committed. This is then used with Geographical Profiling to make inferences about where an offender is likely to live.
Canter’s Circle Theory (1993)
Marauders commit their homes close to home where they are comfortable (usually disorganised). Commuters travel to another location further away (usually organised).
Bottom-up Approach Evaluation
+ Evidence support- Canter and Heritage (1990) analysed 66 sexual assault cases using the approach and found common patterns.
+ Evidence support (Geographical Profiling- Canter and Lundrigan (2001) collated evidence of 120 murder cases and found that the offenders home base was located in the centre of the crime scene pattern.
+ Scientific
+ Wider applications
- Copson (1995) found that 83% of forces found the profile useful but only 3% of cases lead to an accurate conviction.
- Researcher bias- supported by Canter’s own research.
Atavistic Form
Lombroso (1876)- offenders are ‘genetic throwbacks’ or a ‘primitive subspecies’ with distinguishing features, like large noses, large jaws, flashy lips, shifty eyes, etc, that they are born with.
Sheldon’s Body Types (1942)
Stated that there are three body types: ectomorph (sensitive, apprehensive, introverted), endomorph (relaxed, comfortable, pleasant, extraverted), and mesomorph (courageous, risk taker, aggressive, assertive).
Atavistic /Body Type Evaluation
+ The theories were the beginning of offender profiling and lead to a lot of modern forensic research.
+ Championed the use of scientific method.
- No control groups- could’ve just been common characteristics.
- Scientific racism
- Temporal validity
Goring (1913)
Criminals tend to have lower intelligence.
Eberhardt
Stereotypical ‘black’ looking men were more likely to get the death penalty in the USA.
Antisocial Personality Disorder
Impulsive, reckless risk takers with a disregard for the safety of others and a lack of remorse.
Adrian Raine (2000)
Used PET scanning techniques to examine the brains of offenders. He found that those with APD had reduced activity in the prefrontal cortex (regulates emotion). Also, individuals with APD had an 11% reduction in the volume of grey matter in their prefrontal cortex.
Keysers (2011)
Individuals with APD had less activity in mirror neurones that are responsible for feeling empathy. They had to be asked to feel empathy when watching a sad film.
Neuro-ethical dilemma
The usefulness of knowing information about someones neurological condition.
Price (1966)
Suggested that males with an extra Y chromosome were predisposed toward violent crime. They were above average height and below average intelligence.
Christiansen (1977)
Studied 3586 twin pains in Denmark- found a 52% concordance rate for criminality in MZ twins compared to 22% in DZ twins.