Forensic Psychology Flashcards
Define crime.
Act committed which breaks the law and warrants some form of punishment such as imprisonment.
What are the issues with defining crime?
- Legalistic definition may change over time and not all acts that break the law are punished.
- May differ between cultures as social expectations and norms are different, e.g. polygamy.
- May change over time due to social change e.g. legality of homosexuality.
What are the different ways of measuring crime?
- Official statistics
- Offender surveys
- Victim surveys
How are official statistics used to measure crime?
- These are government records of the total number of crimes reported to the police and recorded in official figures, published by Home Office.
- Allows government to develop crime prevention strategies and policing initiatives, as well as directing resources to area most in need.
How are offender surveys used to measure crime?
- Involve individuals volunteering details about the number and types of crimes they have committed.
- Targets group of ‘likely offenders’ based on factors such as age range, previous convictions, social background etc.
- The Offender Crime and Justice Survey, ran from 2003-2006, was first of its kind and as well as measuring self-reported offending it also measured relationship between offender and victim, drug and alcohol abuse, trends in prevalence of offending and indicators of repeat offending.
How are victim surveys used to measure crime?
- Record people’s experience of crime over a period of time.
- The Crime Survey for England and Wales asks victims to document the crimes they have been a victim of in the past year.
- Randomly selects 50,000 households and this enables the Office of National Statistics to produce crime surveys based on these victim surveys.
What is an issue with using official statistics to measure crime?
- Unreliable, significantly underestimate true extent of crime.
- Many crimes go unrecorded by police or unreported by victims that only 25% are included in official statistics.
- 75% = ‘dark figure’.
- Many reasons e.g. mistrust of police, victims fearing revenge and differences in police recording rules e.g. study in Nottinghamshire.
- Suggests policing priorities may distort official figures.
How is using victim surveys to measure crime a better approach to using official statistics?
- More likely to report crimes that go unreported to police, so more likely to have greater degree of accuracy than official stats.
- Less likely to conceal dark figure.
- Evidence: 2006/7 official stats showed 2% decrease in crime from previous year whereas offender surveys showed 3% increase from prev. year.
What is an issue with using victim surveys to measure crime?
- Relies on accurate recall from victims, ‘telescoping’ may occur where victim misremembers an event as occurring in the past year when it did not and this may distort figures.
What is an advantage of using offender surveys as a way to measure crime?
- They provide an insight into how many people are responsible for certain offences (as a small group or individual may have committed several offences).
What is an issue with using offender surveys to measure crime?
- Confidentiality is ensured but may be unreliable.
- Offenders may not reveal more serious crimes they have committed or may even exaggerate.
- Targeted nature of survey means some crimes such as burglary may be overrepresented whereas other middle-class crimes e.g. corporate crimes and fraud may not be included.
What are two other evaluative points for ways of measuring crime?
- All three methods have issues in terms of reliability and validity, multidisciplinary approach may be better to figure out dark figure.
- Political parties have vested interests in using some crime measures rather than others when discussing crime rates across the country.
What is offender profiling?
- Based on idea that characteristics of offender can be deduced from characteristics of the offence and particulars of crime scene.
- Investigative tool used by police to narrow field of enquiry and list of likely suspects.
- Usually involves careful scrutiny of the crime scene and analysis of evidence to generate hypotheses about probable characteristics of the offender.
What are the two types of approaches used in offender profiling?
- Bottom-up approach.
- Top-down approach.
How was the top-down approach developed?
- Originated in US from work of FBI in 70’s.
- Interviews with 36 sexually motivated serial killers including Ted Bundy and Charles Manson.
- Gathered data from these and made pre-existing template.
What does the top-down approach involve?
- Matches what is known about crime and offender to pre-existing template.
- Murderers and rapists classified into one of two categories (disorganised and organised) based on evidence and this informs subsequent police investigations.
- Categories based on idea that serious offenders have certain signature (modus operandi) and these correlate with specific set of social and psychological characteristics.
Give examples of characteristics that an ‘organised’ offender may have.
- Evidence of planning.
- High degree of control during crime and operate with detached surgical precision.
- Killer or rapist usually has ‘type’ of victim.
- Little evidence/clues left.
- Above average intelligence and skilled professional occupation.
- Sexually and socially competent.
- Usually married and may even have children.
Give examples of characteristics that a ‘disorganised’ offender may have.
- Little evidence of planning.
- Offence may have been spontaneous, little surgical precision.
- Body still at scene.
- Below average intelligence and unemployed/unskilled work.
- History of sexual dysfunction and failed relationships.
- Live alone and live close to where offence occurred.
What are the four main stages in the construction of an FBI profile?
- Data assimilation: profiler reviews evidence.
- Crime scene classification: disorganised or organised.
- Crime reconstruction: hypotheses in terms of sequence of events, behaviour of victim.
- Profile generation: hypotheses related to the likely offender, e.g. demographic background, physical characteristics, behaviour etc.
`Evaluate the top-down approach.
- Only applies to certain crimes, e.g. rape and murder and not other crimes such as burglary or destruction of property. Limited approach.
- Organised and disorganised characteristics not mutually exclusive, could be a combination and behaviour may not remain consistent across different situations.
- Sample on which template is based only used 36 criminals, most of which were sexually motivated serial killers.
- Canter analysed data from 100 murders, found no evidence of a distinct disorganised type, undermines classification system as a whole.
What are the main ideas behind the bottom-up approach of offender profiling?
- Developed in UK by David Canter.
- More scientific than top-down approach.
- Generate pic of offender (likely characteristics, social background, routine behaviour) through analysis of evidence at crime scene.
- No assumptions made about person being dealt with, profiler gathers all info then builds logical description.
What are the two main types of profiling in the bottom-up approach?
- Investigative psychology
- Geographical profiling.
Outline investigative psychology.
- Uses stats and psychological theory to analyse crime scene.
- Allows profilers to see whether a series of offences have been committed by the same person.
- Patterns of behaviour help build a statistical database.
- Specific details of offence can be matched against database to reveal important details about offender e.g. personal history.
- Central to approach = interpersonal coherence, states that how person behaves at crime scene may reflect their behaviour in everyday life.
Outline geographical profiling.
- Uses locations of crimes to determine likely home or operational base of offender - crime mapping.
- Assumption: serial offenders restrict their ‘work’ to areas they are familiar with and pattern of offending likely to form circle around usual residence.
- Offender’s base often found in middle of this area.
- Canter identified two types of offenders: marauder and commuter.
- Helps profilers make educated guesses as to where offender will strike next and provides valuable insight into nature of offence e.g. planned or opportunistic, mode of transport used e.t.c.