Unit 2 - Criminological theories - 3.2 Evaluate the effectiveness of criminological theories to explain causes of crime Flashcards
Evaluating biological theories - Physiological theories - Lombroso
What is the key idea of Lombroso’s theory?
Criminals are physically different from non-criminals I.E. facial differences
Clearly explain the 4 strengths of Lombroso’s theory
- Lombroso was the first person to study crime scientifically, using objective measurements to gather evidence. Previously, crime was seen as a moral or religious issue
- His research showed the important of examining clinical and historical records of criminals
- His later work took some limited account of social and environmental factors, not just hereditary
- By arguing that offenders were not freely choosing to commit crime, Lombroso helps us to focus on how we might prevent further offending rather than simply punishing offenders
Clearly explain the 3 limitations to Lombroso’s theory
- Research, Lombroso failed to show a link between facial features and criminality
- Lombroso failed to compare his findings on prisoners with a control group of non-criminals. If he had he may have found the same characteristics among the general population; in which case, his explanation would be invalid
- By describing criminals as like ‘primitive savages’, Lombroso equates non-western societies with criminals. This is a form of racism
Evaluating biological theories - Physiological theories - Sheldon
What is the key idea of Sheldon’s theory?
That body type (somatotype) is related to criminality: Mesomorphs are more likely than other types to commit crime
Clearly explain the 2 strengths of Sheldon’s theory
- Other studies have replicated Sheldon’s findings. Glueck and Glueck found that 60% of the offenders in their study were mesomorphs
- The most serious delinquents in Sheldon’s sample were the ones with the most extremely mesomorphic body shapes
Clearly explain the 5 limitations to Sheldon’s theory
- Glueck and Glueck found that criminality was best explained not by biology alone, but by a combination of biological, psychological and environmental factors
- Criminals may develop a mesomorphic build as a result of needing to be physically tough to succeed. If so, criminality causes somatotype, rather than somatotype causing criminality
- Social class may be the true cause both of offending and of mesomorphy. Convicted offenders are mainly working-class males, who are more likely to be in manual jobs where they acquire an athletic build
- Labelling may play a part. Mesomorphs may be labelled as troublemakers because they fit the ‘tough guy’ stereotype, resulting in a self-fulfilling prophecy. Or they may attract more police attention and get caught more than other somatotypes
- Sheldon doesn’t account for those endomorphs and ectomorphs who commit crime. Nor does he explain whether mesomorphs commit crimes other than violence
Evaluating biological theories - Genetic theories - Twin studies
What is the key idea of genetic theories relating to twin studies?
Genetic theories argue that crime has genetic causes. Identical (MZ) twins are genetically identical, so if one is criminal, we should find that the other is too
Clearly explain the 2 strengths of twin studies
- Because MZ twins are genetically identical, it is logical to examine whether their offending behaviour is also identical
- Twin studies give some support to genetic explanations. Ishikawa and Raine found a higher concordance rate for identical twins rather than non-identical twins
Clearly explain the 5 limitations of twin studies
- If genes were the cause of criminality, identical twins (MZ) would show 100% concordance, but studies only show around 50% or less
- Higher concordance rates between identical twins may be due to sharing the same home, school etc. Their shared environment might cause similarities in their criminal behaviour, not identical genes
- Parents treat identical twins more alike than they do non-identical twins. Also, identical twins may feel closer than non-identical twins do, so one twin may be influenced by the other’s criminality to become criminal too. These environmental factors may provide similarities in behaviour
- It is impossible to isolate and measure the effect of genes separately from environmental effects
- In early studies, there was no way of knowing for certain if twins were in fact genetically identical, since DNA testing did not exist
Evaluating biological theories - Genetic theories - Adoption studies
What is the key idea of adoption studies?
Comparing adopted children’s level of criminality with that of both their biological parents and adoptive parents so that we can see how far genes influence criminality
Clearly explain 3 strengths of adoption studies
- Adoption studies overcome the problem faced by twin studies, where biologically identical twins are brought up in the same household, which makes it impossible to separate out the influence of genes from environment
- The research design is logical. In theory it allows us to see the relative importance of ‘nature’ ( the genes inherited from biological parents) versus ‘nurture’ (the adoptive family environment
- Findings of adoption studies give some support to genetic explanations. They show adoptees were more likely to have criminal records if their biological parents had criminal records
Clearly explain 3 limitations of adoption studies2
- Gottfredson and Hirschi argue that adoption studies show genes have little effect on criminality
- Adopted children are often placed in environments similar to those of their birth family, with families of the same class and ethnicity. Similar environments may produce similar behaviour
- Many children are not adopted immediately after birth but remain with their biological family for some time. This early environment may be the true cause of their criminality
Evaluating biological theories - Genetic theories - XYY syndrome
What is the key idea of Jacob’s XYY syndrome theory?
Males who have an extra Y chromosome are often violent criminals
Clearly explain 2 strengths of Jacob’s XXY theory
- Jacob et al found an association between XXY syndrome and offenders imprisoned for violent behaviour
- Price and Whatmore found some links between the syndrome and property crime
Clearly explain the 4 limitations of Jacob’s XXY theory
- Even if some violent offenders have the syndrome, this doesn’t prove it is the cause of their violence
- XXY males are tall and well built, so they fit the stereotype of ‘violent offenders’ and get labelled as such by the courts, so they are more likely to get a prison sentence. As a result, XXY males are over-represented in samples drawn from prisoners and this overstates the importance of the syndrome as a possible cause of crime
- Alternatively, XXY males may be over-represented in prison because they often have a low intelligence, meaning they are more likely to be caught. Samples drawn from prisoners are therefore skewed
- The syndrome is very rare (1 in 1000 men) so it cannot explain much crime
Evaluating biological theories - Brain injuries and disorders
What is the key idea of Brain injury and disorder theories?
Injuries, disorders and diseases of the brain may cause it to malfunction in ways that change personality, morals or self-control, leading to criminal behaviour
Clearly explain the 3 strengths of brain injuries and disorder theories
- In a few extreme cases, brain injury or disease has led to major changes in an individual’s personality and behaviour, including criminality
- There is some correlation between abnormal EEG readings (brainwave activity) and psychopathic criminality
- Prisoners are more likely than non-prisoners to have a brain injury
Clearly explain the 3 limitations of brain injuries and disorders theories
- Crimes caused by brain injury or disease are rare. The sufferer’s original personality is more important in whether they engage in crime
- It is not clear that abnormal brainwave activity causes psychopathic criminality. Some psychopaths have normal EEG patterns and some normal people have abnormal EEG patterns
- Prisoners’ higher likelihood of brain injury could be a result of their criminality (eg getting into fights), rather than the cause of it
Evaluating biological theories - Biochemical explanations
What Is the key idea of biochemical explanations?
Biochemical factors may trigger criminal behaviour by affecting brain chemistry and mental processes
Clearly explain 4 strengths of biochemical explanations theories
- Sexual hormones, blood sugar levels and substance abuse can affect mood, judgement and aggression
- Testosterone levels and male offending both peak around the same age (16 to 23) , suggesting hormones affect criminal behaviour
- Alcohol produces disinhibition, reducing self-control and leading to criminal behaviour, particularly violence. Crack cocaine has been strongly linked to violent crime
- Biochemical factors are recognised by the courts. The law of infanticide states that if a mother kills her baby as a result of post-natal depression or breastfeeding, she has a partial defence to murder. Pre-menstrual tension has been accepted as a defence in shoplifting cases
Clearly explain 4 limitations of biochemical explanations
- Biochemical processes may prompt some individuals to offend, but it may require an environmental trigger to cause actual offending
- Scarmella and Brown found testosterone levels do not greatly affect aggression levels in most men
- Infanticide may be due to isolation and the responsibility for caring for a newborn child rather than hormones
Briefly explain the GENERAL criticisms of biological theories
Environmental factors - Biological theories ignore environmental factors. A person’s biology may give them potentially criminal characteristics (aggressiveness) but they may need an environmental trigger to engage in a criminal act
Sample bias - Researchers often use studies of convicted criminals, but these may not be representative of the criminals who got away, so they are not a sound basis for generalising about all criminals
Gender bias - Most biological research focuses on males, so it doesn’t explain female criminality
Crime is a social construct - What counts as a crime varies between cultures and over time, so it makes no sense to look for universal explanations, as biological theories do
Evaluating individualistic theories - psychodynamic theories - Freud
What was the key idea of Freud’s psychoanalytic theory?
Criminal behaviour is the result of faulty early socialisation preventing the individual resolving unconscious conflicts between the id and superego
Clearly explain the 2 strengths of Freud’s psychoanalytic theory
- The theory points to the importance of early socialisation and family relationships in understanding criminal behaviour
- Psychoanalytic explanations have had some influence on policies for dealing with crime and deviance
Clearly explain the 2 limitations of Freud’s psychoanalytic theory
- Critics doubt the existence of an ‘unconscious mind’ - how could we know about it, if its unconscious
- Psychoanalytic explanations are unscientific and subjective - they rely on accepting the psychoanalyst’s claims that they can see into the workings of the individual’s unconscious mind to discover their inner conflicts and motivations
Evaluating individualistic theories - psychodynamic theories - Bowlby
What is the key idea of Bowlby’s maternal deprivation theory?
Bowlby sees maternal deprivation as a cause of criminality and stresses the importance of the parent-child bond
Clearly explain the 2 strengths of Bowlby’s maternal deprivation theory
- Bowlby’s research showed that more of his sample of 44 juvenile delinquents had suffered maternal deprivation (39%) than a control group of non-delinquents (5%)
- His work shows the need to consider the role of parent-child relationships in explaining criminality
Clearly explain the 5 limitations of Bowlby’s maternal deprivation theory
- It was a retrospective study, where delinquents and their mothers had to accurately recall past events. This can be a problem, especially if it involves recalling emotive experiences
- Bowlby accounts for the delinquents of 39% of the children in terms of maternal deprivation but doesn’t explain why the other 61% were delinquent. Deprivation cannot be the only cause
- Bowlby’s own later study of 60 children who had been separated from their parents for long periods before they were 5, found no evidence of ‘affectionless psychopathy’
- Bowlby overestimates how far early childhood experiences have a permanent effect on later behaviour (also a criticism of Freud)
- Sammons and Putwain note that the idea of a link between maternal deprivation and criminality is no longer widely accepted