Forensic Psychology Flashcards
Crime definitions:
Crime: A violation of law which warrants some kind of punishment.
Changing definitions: Crime is defined differently by different cultures (e.g. polygamy) and at different historical periods (e.g. homosexuality).
Official statistics: Figures based on the numbers of crimes that are reported and recorded by the police.
Victim surveys: A sample of people are asked which crimes have been committed against them, which may or may nor have been reported to the police.
Offender surveys: People record the number and types of crime they have committed over a specified period
What is offender profiling: The Top-Down Approach?
Offender profiling: A tool to help investigators to accurately predict likely offenders -developed in the US - used by the FBI
Top-down approach: Offenders are assigned to one of two pre-existing categories based on witness accounts and evidence from the crime scene (disorganised and organised offender)
The FBI then construct a profile using this approach and this consists of: (1) Data assimilation, (2) crime scene classification, (3) crime reconstruction, (3) profile generation.
What is the difference between an organised offender and a disorganised offender?
Organised offender: Evidence of planning, targets victim, tends to be socially and sexually competent with higher than average intelligence e.g. Ted Bundy
Disorganised offender: Little evidence of planning, leaves clues, tends to be socially and sexually incompetent with lower than average intelligence.
Evaluation of the Top-Down Approach
Only applies to particular crimes e.g. murder and rape
Based on outdated models of personality - implies that behaviour is driven by stable personality traits when personality traits may be constantly changing and influenced by external factors
Classifications are too simplistic - not clear cut - may be a combination of both or other types may also exist
Evidence is based on small samples - unrepresentative
What is offender profiling: The Bottom-Up Approach?
Developed by the British - looks at the evidence at the crime scene rather than with fixed typologies - grounded in investigative psychology - tries to work out what the offender is thinking
Investigative psychology - Establishes patterns of behaviour forming a statistical ‘database’.
Geographical profiling- The location of crimes is a clue, ‘marauder’ operates close to home and ‘commuter’ travels.
Interpersonal coherence - Offender’s behaviour at crime scene reflects their everyday behaviour and thus is a clue.
Forensic awareness - Individuals who have been the subject of police interrogation before ‘cover their tracks’.
Evaluation of Bottom-Up Approach
Evidence supports the use of investigative psychology and geographical profiling. For example serial killers have been found to sometimes form a pattern in where they pick up bodies or bury victims and this can lead to solutions
More scientific than Top-Down Approach as it is based on scientific theories and it is more objective - less about speculation and hunches
Can be applied to a wide variety of approaches as opposed to Top-Down processing, which is limited.
Sometimes offender profiling can go wrong - they can rule the wrong person out e.g. in the case of Rachel Nickell
Summarise the Biological Explanation of Offending Behaviour - Atavistic Form
This is a historical approach - 1876 Lombroso wrote which suggested that criminals were genetic throwbacks and biologically different from non-offenders. The summary of his ideas are:
Atavistic form: Genetic throwbacks, having characteristics consistent with primitive humans.
Cranial characteristics: Narrow, sloping brow, a strong prominent jaw, high cheekbones and facial asymmetry.
Other characteristics: Insensitivity to pain, use of criminal slang, tattoos and unemployment.
Types of criminals: Murderers had bloodshot eyes, curly hair and long ears. Sexual deviants had glinting eyes, fleshy lips and projecting ears. Fraudsters had thin lips.
Evidence: Analysed the facial and cranial features of 383 dead criminals and 3839 living ones. Concluded that 40% of criminal acts could be explained by atavistic characteristics.
Evaluation of the Biological Explanation of Offending Behaviour - Atavistic Form
Involved scientific racism - many physical traits that Lombroso identified e.g. curly hair an dark skin - applied to people from African Descent
Promoted and inspired more research into criminality and investigating patterns of offenders
Labelling and stereotyping people who are poor or with low IQ as potentially criminals - many traits may have been caused by poverty/poor diet
Summarise the Biological Explanation of Offending Behaviour - Genetic and Neural Explanations
Suggests that potential offenders inherit or gene or many genes that may lead them to commit crimes
Candidate genes: Two possibilities are the MAOA gene and CDH13.
Diathesis-stress model: Criminal behaviour is due to a combination of inherited factors and environmental influences.
Twin studies: Christiansen (1977) found concordance rates of 33% (MZ) and 12% (DZ).
Adoption studies: Mednick et al. (1984) found 13.5% criminal convictions in adoptive children with no biological or adoptive criminal parents, rose to 20% with one criminal biological parent and 24.5% with one biological and one adoptive criminal parent.
Neural explanations: People with antisocial personality disorder (APD, lack of empathy) have reduced activity in the prefrontal cortex.
Mirror neurons: People with APD did show empathy when asked to – mirror neurons activated (Keysers et al. 2011).
Evaluation of the Biological Explanation of Offending Behaviour - Genetic and Neural Explanations
Deterministic and reductionist - saying that genes determine whether a person commits a crime and also too simplistic an explanation
Cannot removal environmental factors from twin studies - some adoption studies may have used children who were adopted later and already exposed to disadvantageous environmental factors
Nature or nurture? Or both
Summarise the Psychological Explanation of Offending Behaviour - Eysenck’s Theory
Eysenck looked at different personality dimensions, e.g. introvert and extrovert, and how they affected certain behaviours, and used this to explain criminal behaviour. The traits are biological in origin.
The criminal personality: Scores highly on measures of extraversion, neuroticism and psychoticism.
Extraversion: Chronically under-aroused nervous system, which leads to sensation-seeking and risk-taking behaviour.
Neuroticism: Unstable, unpredictable behaviour; moody, insecure and anxious.
Psychoticism: Cold, heartless offender who has an inability to feel remorse or guilt.
Socialisation: Extraverts and neurotics do not condition easily and do not learn to respond to antisocial behaviour by becoming anxious, as most people do.
Eysenck Personality Inventory (EPI): A psychological test, which measures extraversion and neuroticism and determines personality type. A later scale was introduced that is used to measure psychoticism.
Evaluate Eysenck’s Psychological Theory of Offending Behaviour
Supporting Evidence - Eysenck and Eysenck measured personality traits of prisoners compared to controls - found that prisoners had higher scores of neuroticism, extraversion and psychoticism
Cultural bias - some cultures may be more likely to be extravert - leads to labelling/stereotyping
Use of scales and tests to measure personality traits - social desirability bias - narrow answers
Are our personality traits stable - they may change depending on circumstances - deterministic and reductionist to say personality type may lead to criminal behaviour
Summarise Cognitive/Psychology Explanations of Offending Behaviour - Kohlberg
Kohlberg used moral reasoning to explain criminal behaviour. Offenders are less likely to be efficient at moral reasoning:
Level of moral reasoning: A series of progressively more logically consistent stages. An individual uses their own value system to think about whether an action is right or wrong.
Moral dilemmas: Kohlberg used moral stories with his participants to measure level of moral reasoning.
Kohlberg’s theory: Criminal offenders are more likely to be classified at the preconventional level (associated with child-like reasoning)
Evaluate the Cognitive/Psychology Explanations of Offending Behaviour - Kohlberg
Application - Kohlberg’s theory has led to CBT of offenders to help them realise the consequences of their actions
Supporting Evidence - Palmer and Hollin (1998) used the Socio-Moral Reflection Measure Short Form which contains moral related stories to test levels of moral reasoning in offenders vs non-offenders. Offenders showed less mature moral reasoning than non-offenders.
Summarise the Cognitive/Psychology Explanations of Offending Behaviour - Cognitive Distortions Explanation
Faulty thinking may mean that inappropriate behaviour is justified, accepted and continued in the offender
Cognitive distortions: Biased ways of thinking which may be used to rationalise or justify offending behaviour.
Hostile attribution bias: Judging situations as aggressive and/or threatening when in reality they may not be
Minimalisation: Downplaying the significance of an event or emotion as a means of dealing with guilt.