Paper 3: Forensic Psychology Flashcards
What is the American Approach to offender profiling?
The Top-down approach.
Who detailed the FBIs 4 criteria and what are they?
Douglas et al
Assimilation
Classification
Reconstruction
Profile generation
What are the two types of Offenders in the American approach of offender profiling?
Organised and Disorganised.
What are the steps after dividing the two types of offenders in the American approach?
The police will attempt to reconstruct the crime before generating a profile of the criminal with specific characteristics.
What are the strengths of the top-down approach to offender profiling?
McCary and Grant successfully used the approach to accurately identify a murderer.
The FBI used 36 real murderers to create the profiling system.
What are the weaknesses of the top-down approach to offender profiling?
Conflicting evidence, Pinizzotto and Finkel found that profiles of sexual assault cases were no more accurate from professionals than a control group.
Only useful for certain types of crimes eg murder and not for burglaries.
Overly simplistic, only two profiles to be divided, some criminals have characteristics that fit into both.
What approach of criminal profiling do the British use and how does it work?
The bottom-up approach.
Use of investigative psychology to solve crimes.
Canter - Interpersonal coherence, the way a criminal behaves when committing a crime is reflected in their normal behaviour.
Statistical Analysis is used to identify themes in their behaviour to identify several characteristics.
Geographical profiling is used, believing a serial killer will live in the circle of their crimes.
Also differentiates between marauders (those who kill in their area) and commuters (those who travel).
Strengths of the Bottom up approach?
Research by Canter and Larkin found 87% of serial killers lived within the circle of murder.
Canter used the profile to find the ‘railway rapist’
Can be used for a wide range of crimes, not just rape and murder.
More scientific using measurable data.
What % of offender profiles were found to be accurate in the bottoms up approach?
Just 3%
What are the 3 biological explanations of offending behaviour?
Atavistic form
Genetics
Neural factors
Who proposed the atavistic form and what were 3 features of it?
What was the further explaination?
Lombroso, heavy brow, strong jaw, extra fingers/nipples
That different types of criminals had different features eg murders had curly hair.
Strengths of the atavistic form theory?
Historical importance, advanced the study of criminology and forensic psychology.
Weaknesses of the atavistic form theory?
Methodological concerns, didn’t compare to a control group.
Alternative explanations, someone ‘ugly’ may be a criminal due to societal treatment.
Ethical concerns, socially sensitive research
What were the two studies conducted looking at the genetic components of crime?
Christiansen found a 35% concordance rate for identical twins and a 12% concordance rate for non-identical twins for males.
Lange found 77% of identical twins had both gone to jail compared to 12% non-identical twins.
Who looked at adoption studies when researching the genetic component to crime?
Mednick found a child has a likelier chance of being a criminal with a criminal biological parent than a criminal adoptive parent.
What genes have been seen to affect criminality?
MAOA-Lis linked with aggressive behaviour and therefore criminal behaviour. Brunner et al studied a family with aggressive and criminal behaviour and found all the males shared the gene.
What are the weaknesses of the genetic factors for criminality?
Concordance rates, if criminality was down to genetics, it should have a 100% concordance rate with identical twins.
Methodological issues, Mednick’s adoptees were often raised by biological parents before being adopted.
Deterministic, it restricts a persons free will. Also raises legal and moral issues.
What are the two neural factors that affect behaviour?
Brain structure and neurotransmitters.
Who conducted the brain scan studies and what were the results?
Raine et al (1997) compared brain scans conducted on 41 convicted murderers and with brain scans conducted on 41 control participants. The researchers observed that the murderers had reduced activity in the prefrontal cortex, the superior parietal gyrus, left angular gyrus, and the corpus callosum compared to the control group.
Who researched the link between genes and neurotransmitters?
Brunner believed certain genes are responsible for the release of certain neurotransmitters eg serotonin and dopamine.
Weaknesses of Neural explanations?
Small sample sizes: Studies linking criminal behaviour with neural factors often use small sample sizes.
Ethical issues: An implication of Raine’s research is that brain scans in childhood could be used to identify potentially violent criminals of the future.
Deterministic: Neural explanations are biologically deterministic because they say that neural factors are what cause criminal behaviour, not free will.
Who came up with the theory of personality for psychological explanations for criminal behaviour and what were the 3 personality traits?
Eyesenck
Extrovert vs. introvert:
An extrovert is someone who is sociable, talkative, more impulsive and risk-taking.
In contrast, an introvert is someone who prefers to spend time alone and is less impulsive and less inclined to take risks.
Neurotic vs. stable:
A neurotic person is someone who is prone to strong negative emotions such as anxiety, worry, nervousness, and jealousy.
In contrast, a stable person is (as the name suggests) more emotionally stable and calm.
Psychotic vs. non-psychotic: This third trait was added to the theory of personality in Eysenck (1966).
A psychotic person lacks empathy, does not feel guilt, and is aggressive and unconventional.
In contrast, the majority of people are non-psychotic – they have a conscience and feel empathy and guilt.