forensic psychology Flashcards
Canter
+research support of TOP DOWN
David Canter (2004) conducted an analysis of 100 US murders each committed b y different serial killers. - smallest space analysis was used. The analysis revealed that there does seem to be a subset of features of many serial killings which matched the FBI’s organised offenders
HOWEVER —–
many studies suggest that organised and disorganised types are not mutually exclusive - a variety of combinations can occur
Meketa
+wider application TOP DOWN
Can be adapted to other kinds of crime - such as burglary
Tina Meketa - reports that top down has recently been applied to burglary leading to an 85% rise in solved cases in three US states
Lundrigan and Canter
+evidence for BOTTOM UP
Lundrigan and Canter (2001) collated information from 120 murder cases involving serial killers in the US- smallest space analysis revealed spatial consistency c reating a ‘centre of gravity’ - the offenders base was invariably located in the centre of the pattern
Lange
twin studies- genetic explanation
compared concordance rates for prison sentences among 13 identical twins and 17 non-identical twins. 10 of the 13 pairs of identical twins (77%) had both spent time in prison, whereas only 2 of the 17 non-identical twins (12%) had both spent time in prison.
Christiansen (1977)
Twin and adoption studies
analysed the concordance rates for criminal convictions among 3,586 pairs of twins. Among males, concordance rates were 35% for identical twins and 12% for non-identical twins. Among females, the concordance rates were 21% for identical twins and 8% for non-identical twins
Tiihonen et all
+candidate genes
suggested that the gene MAOA regulates serationin and has been liked to aggressive behaviour - genetic analysis of almost 800 Finnish offenders - 5-10% of all severe violent crimes is attributable to this gene
Raine
Neural explanations
conducted many studies of the antisocial personality disorder brain, reporting that there are several dozen brain-imaging studies demonstrating that individuals with antisocial personalities have reduced activity in the prefrontal cortex - the part of the brain that regulates emotional behaviour
-raine also found an 11% reduction in the volume of grey matter in the prefrontal cortex of people with APD compared to controls
Furnham
research support for psychological- Eysenck
Furnham (1984) tested 210 subjects using Eysenck’s personality theory, a social skills test, and a test of anomie (which basically means moral values). Of these 3 tests, the results of Eysenck’s personality theory were the most accurate predictors of criminal behaviour, which supports the criminal personality theory explanation of criminal behaviour.
Eysenck
+research support
compared 2070 prisoners scores on the personality test with 2422 controls - on all measures - prisoners recorded high average scores than controls - this agrees with the predictions of the theory that offenders rate higher than average across the 3 dimensions Eysenck identified
Farrington
-counter research for Eysenck
conducted a meta analysis of relevant studies and reported that offenders tended to score high on measure of psychotisism but not for extraversion and neuroticism
Schoenberg and Jusyte
+support for hostile attribution bias
presented 55 violent offenders with images of emotionally ambiguous facial expressions
-when compared with a non- aggressive matched control group, the violent offenders were significantly more likely to perceive the images as angry
Palmer and Hollin
+supporting research for cognitive- stages of moral development
Palmer and Hollin (1998) used questionnaires to compare the moral reasoning abilities of 126 male convicted offenders with 122 male non-offenders. The researchers found that the male offenders had significantly poorer moral reasoning compared to the male non-offenders, which supports the idea that underdeveloped moral reasoning contributes to criminal behaviour.
Barbaree
+support for minimisation
found among 26 incarcerated rapists, 54% denied they had committed an offence and a furtherr 40% minimised the harm done to the victim
Bartol
-limitation of custodial sentencing- negative psychological effects
suggests that for many offenders, imprisonment can be ‘brutal, demeaning and generally devastating’
-ministry of justice reported 119 people killed themselves in prisons in England and Wales in 2016 - an increase of 32% from the previous year - average suicide of 1 every 3 days - 9x higher than general population
also found that 25% of women and 15% of men experienced symptoms of psychosis
however, does not account for offenders who experiencing psychotic symptoms before they were incarcerated and may have pre-existing psychological and emotional difficulties (many explain offending behaviour in first place)
-confounding variables as the psychological problems may stem from the prison regime, or simply being locked up