Forensic Psychology Flashcards
1 (+) of Top- Down approach
R.S for organised offender. Canter et al (2004)
-analysed data from 100 murderers in USA
-data examined with reference to 39 characteristics
found evidence of a distinct organised type
4 (-) Top-Down approach to offender profiling
(-)However Canter et al found no evidence of disorganised type
(-)Difficult to categorise disorganised and organised offenders. A scene can show multiple types of offender
(-) Original sample , approach was developed using 36 killers in the US. unrepresentative
(-)Particular crimes. only useful for crimes that show important details. Common crimes not applicable
Bottum up approach Eval summary
(+)R.S, Railway Rapist
(+)R.S, Canter + Heritage, analysed SA cases. common behaviour. E.g: use of impersonal language + lack of reaction to victim.
(+) Scientific basis,
(+) Wider application.
(-) Research Refuting - Wrongly identified
(+)R.S, Railway Rapist
Bottom up
Duffy was correctly arrested. Correct profile = predicted he did martial arts
(+)R.S, Canter + Heritage,
Bottom up
analysed 66 SA cases. Data analysed using small space analysis. Several beh. identified common in different samples of behaviour. E.g: use of impersonal language + lack of reaction to victim. Each individual displayed a characteristic pattern of behaviours
(+) Scientific basis,
Bottom up
More so than Top-Down. Aid of advanced AI, investigators able to manipulate geographical, biographical, psychological data to produce insights assisting investigation
(+) Wider application.
Bottom up approach
(+) Wider application. applied to wider range of offences than T-D. Smallest space analysis and spatial consistency can be used in smaller crimes as well as bigger ones
(-) of Bottom up approach
Research Refuting
Research Refuting
Rachel Nickel. stabbed 47 times and sexually assaulted.
Psychologists drew up an offender profile. Profile matched Collin Stagg. police investigated him using a ‘honey trap’. the case was thrown out of court. 2008, Robert Napier convicted of the murder
Atavistic form Evaluation summary
(+) R.S Lombroso conducted own extensive study.
(-)Research against. Goring (1913) compared criminals to non criminals
(-) Too socially sensitive. DeLisi (2012) Criticised Lombroso for ‘scientific racism’,
(+)influential in field of criminology.
(-) Ignores impact of nurture
(+) R.S Lombroso
Atavistic form
conducted own extensive study. examined over 4000 skulls to come up with conclusions about physical features and offending behaviours
(+)influential in field of criminology
Atavistic form
Moved criminology forwards into a more scientific and rigorous field, shifting away from an emphasis on an individuals morals (which is hard to measure) leading to some key expls.
(-)Research against. Goring (1913)
Atavistic form
compared 3000 criminals to 3000 non-criminals (smth Lombroso didn’t do) found no evidence that offenders are distinct group with unusual facial and cranial characteristics
(-) Too socially sensitive. DeLisi (2012) Atavistic form
(-) Too socially sensitive. DeLisi (2012) Criticised Lombroso for ‘scientific racism’, claiming many of the features outlined were most likely to be found in individuals of African descent .
Also if we were able to identify criminals, this could potentially lead to eugenic philosophies
overall eval of Genetic expl of offending beh
(+)R.s Christiansen 1977 - twin study
(-) Can’t separate nature + nurture . MZ treated more similarly than DZ
(+) R.s Crowe
(-) Adoption studies still visit bio parent
(+)Tiihonen et al (2015) -Found violent prisoners in Finland commonly have two faults with their genetic code.
(+) R.S. Christiansen (1977)
Twin studies on offending beh
(+) R.S. Christiansen (1977) Sample = 3500 pairs of twins from Denmark (all twin pairs born between 1880-1910). Offending behaviour was checked against Daish police records. Found 35% MZ, 12% DZ
(-) Twin studies on offending beh
Confounding variable
Confounding variable = environment. Cannot determine concordance rats are due to shared genetics or shared upbringing. MZ treated more similarly than DZ
(+) R.S, Crowe (1972)
disadvantage
(+) R.S, Crowe (1972) Found that adopted children who’s biological mother had a criminal record had a 50% risk of having a criminal record by the age of 18 - whereas adopted children who’s biological mother did not have a criminal record only had a 5% risk
(-) biological and environmental influences may not be completely separated. Biological parents may have an influence still by -maintaining contact -Child adopted later in childhood SO Genes not completely isolated
(+) Tiihonen (2015)
Found violent prisoners in Finland commonly have Faults with MAOA and CDH13 gene.
Those who had committed violent crime had low activity in MAOA and variations of CDH13
Found 5-10% of all severe violent crimes were attributed to these genes
All A03 points for neural expls of criminal behaviour
(+) R.S Raine pre frontal cortex activity
(-) Link between neural differences and ADP are complex.
(+)R.S- Kandel + Freed (1989) - Frontal lobe damage
(-) Biological reductionism - Katz et al
(-) Ignores roles of nurture
(+) R.S Raine pre frontal cortex activity
NEURAL expl of Criminal beh.
Raine injected glucose into brains of 41 suspected murderers who pleaded insanity.
Compared against 41 controls
Used PET scans to measure brain activity.
Found less activity in pre frontal and parietal areas (decision making)
(-) Biological reductionism
NEURAL expl of Criminal beh.
- Katz et al (2007)
emotional instability, mental disorder, social deprivation, poverty All run in families . Difficult to distinguish the causes of these As criminality is complex, Neural theory is overly simplistic. Fails to consider other factors e.g: criminal behaviour
(-) Link between neural differences and APD are complex.
NEURAL expl of Criminal beh.
Farnington (2006)
Men who scored higher APD had experienced various risk factors during childhood. e.g: raised by convicted parents, physically neglected.
Childhood experiences may lead to neural difference s and APD
Thi means that other factors may contribute towards APD and Therefore offending
(+)R.S- Kandel + Freed (1989)
NEURAL expl of Criminal beh.
Reviewed evidence of frontal lobe damage (including pre-frontal cortex) and antisocial behaviour.
Found people with such damage tended to have impulse behaviour, emotional instability + inability to learn from mistakes
All A03 for Eysenck’s Criminal personality
(+)R.S Zuckerman (1979) Testosterone + sensation seeking scale as men scored highly on this scale
(-)R.Refuting. Bartol + Holanchock. Hispanic + African American offenders less extroverted
(-) Social Desirability Bias . Questionnaire to measure criminal personality - Less useful
(+)R.S Eysenck + Eysenck (1977) compared scores of Eysencks personality index in prisoners
(-) Doesn’t explain why criminals commit crimes/motivation. Only explains biology. Not useful
(-)Culture Bias. Bartol + Holanchock.
Hispanic + African American offenders less extroverted than non-offender control groups
Maximum security prison in New York
suggests criminality may not be linked to extraversion
(+)R.S Eysenck + Eysenck (1977)
compared scores of Eysencks personality index in 2000 male prisoners scores on EPI with 3000 male controls. Prisoners scored higher than controls on measures of psychoticism, extraversion + neuroticism
Suggests 3 personality types are linked to criminal personality
(+)R.S Zuckerman (1979)
Link between testosterone + biology.
Testosterone + sensation seeking scale linked as men scored highly on this scale
Suggests high levels of testosterone are linked to extraversion
All Evaluation of
Kohlberg’s moral development theory
(+) Kohlberg (1973) Used Moral Dilemmas on violent youth vs non-violent youth
(+)Emma Palmer and Clive Hollin (1998) The offender group showed less mature moral reasoning than the non offender group.
(-)Indiv. differences . David Thornton (1982)
(-) Alt. theories of moral reasoning. John Gibbs Proposed two levels of moral reasoning: mature and immature.