Ac2.1 - describing the biological theories into criminality Flashcards
What do the biological theories to crime further suggest?
There behaviour is then down to the characteristics they would have then been born with - for example eye colour
What is the XYY theory(genetic theory)?
There is further a Y chromosone and this is then associated with an increase in testerone which is then associated with agressive behaviour and those with the extra Y chromsone are more likely to then be a criminal than males with a single Y chromosone - they are often reffered to as then being “super males” - we have 46 chromosones and two determine our sex and the pattern of the chromosones - women xx - men xy
What does the XYY theory suggest?
some crime might be to do with chromosone abonormaility
What did Jacob et al do in his study - supporting the XYY theory?
They were studying individuals in a hospital with max security and realised there was a higher proportion that had XYY chromosones than the general population - he had found that 1 in 1000 men had XYY in society - they were 15 in 1000 prisoners with XYY
What is the stockholm theory - supporting research?
He had found out there was an increase in the number of convicted males who with XYY compared to the general incidents of crime with the general population - commiting crime and XYY is then correlational
Real life case study to do with XYY theory?
John Wayne Gacey - he had further been convicted for murder, torture,rape and he also had the XYY syndrome - there were enviromental factors involved as since he was 4 he had been physically and emotionally abused
What are some more real life case studies we could further use to support the XYY theory?
Richard Speck - he had been convicted for a mass murder - he had the XYY syndrome - there are other factors because of his stepdad abusing him
What is a last case study we can use to support the XYY theory?
Daniel hugon - he had murdered a prostitute in Paris and he had the XYY syndrome - he also had required pyschiatric care from earlier ages from when he was then further 17
What are strengths of the XYY theory?
- There is alot of supporting research - for eample Jacob et al and Stockholm
- If we are finding the syndrome early(25% of them at birth) we are then able to give them intervertions to help deal with problems that may then be occuring within the future
What are some weaknesses of the XYY theory?
- The theory further then does not consider any enviromental factors like how you were further brought up - this could link to the case study of Richard Speck as he was then abused by his father from the age of 4
- Having XYY could then further end up causing individuals to then be feeling different so this group could be excluded from society and then could end up being bullied
- The theory of this may then also not be explaining why individuals that do not have this XYY syndrome may be commiting crimes - this also does not explain female criminality as this gene is only then being found within men
What are the twin studies(genetic theory) ?
Monozygotic twins - they are born from the same egg with 100% DNA are then more likely to have concordance(being similar) than Dizygotic twins - they are born from two eggs and they have 50% of the same DNA- this is then supporting that crimes are then to do with genetics
What is the twin study of Johannes lange?
He had further investigated 13 MZ twins and 17 DZ twins - he had further then found out that 10 of the 13 MZ twins, 67% concordance rate had both then served time within prison and only 2 of the 17 DZ twins, 13%, had both been serving time within prison - this had further concluded that genetic factors in twins then do play an extremely important role, due to there being significantly higher concordance rates in the MZ twins
What further was the the twin study of Christiane?
- This study was further looking in to proving whether genes where a result of criminality
- This was further being done through investigating 3568 pairs of twins that had been born within Denmark
- She had further found concordance rates( reflecting the odds if one person has a trait the other will) and had found that male twins are more likely to be sharing criminal characteristics compared to female twins
MZ (they are identical twins) Gender - male - 35% - female - 21%
DZ(non identical) - male - 13% - female - 8%
What are the strengths of these twin studies?
- the results for the studies have then further helped with the preventation of vulnerable disorders - they are then able to catch these disorders early and put them in early intervention so then it does not lead to causing a problem
- The studies give us more supporting evidence that the view of criminality is created through the genetic component
What are some weaknesses of the twin studies?
- Early twins studies had been inadequately controlled and lacked validity for whether the twins were MZ or DZ it was based on there appearance - of the twins and not the DNA - so may not be scientific
- There is a small sample so may then not be representable for the whole population
- If the twins are brought up in the same environment then criminality could easily be about the environment and then not just the genetics
- Twins look the same or even similar and so could then be treated the same by people who are around them - so we do not know if it genetics causing the problems or the enviroment
What are adoption studies(genetics)?
- these are studies where adopted children are compared to there biological and there adopted parents to see which has had more of an influence out of the environment or biology
What further is the study of hutching’s and Mednick(genetic) (adoption study)?
- They wanted to see if there was a genetic link with criminal behaviour
- They had studied 14,000 adopted children and had found a high boy proportion with criminal convictions had biological fathers who had criminal convictions too
- The included a control group where it was set up on things like there sex and age - they were checked whether they had criminal records as well as there fathers being checked, for the experimental group they checked the adopted and biological
- he had further found that a massive amount of male offspring with criminal convictions had biological parents with criminal convictions
The strengths of adoption studies?
- They are exposed to a different enviroment from there biological family so then easier to seperate the enviroment and then biological
-The studies had further concluded that there is a correlation between adopted children and there biological parents
The weaknesses of adoption studies?
- The age of adoption may then mean children have already been influenced by there environment
- They had further made the use of self report methods so then they could have ended up commiting a crime but they may have then just not have been caught
- It does not shows whether the type of crime that has been commited via the father has then further had an effect on what the results has then said
What is lombroso’s atavistic theory (physiological theory)?
- He had arrived at his theory when he was measuring skulls, analysing the features of criminals and recording tatoos
-He explains criminality in the concept that we are “born criminals”, they are an evolutionary throwback and primitive versions of human beings, they have atavistic features that characterise a criminal like smaller skulls, heavier and taller, receding chin, twisted nose, large forehead
What makes Lombrosos theory being considered as physiological?
It is related to the physical body parts and also the criminals appearances
What further is the evaluation that we can have about Lombroso that is considered as a weakness?
- His work had become a problem because many jurors had ended up finding it difficult as they had been making use of biological terms that they didn’t understand and they were then becoming overwhelmed
- There had been a study by Charles goring that had also further tried to challenge him and he had found that there had been no physical differences between criminals and non criminals
What is the further evaluation that could be considered as being a strength?
- His research had further become the starting point to try and develop more research to try and look into the causes of biological and physiological factors that may be playing as being a contribute to understanding criminal behaviours
- He had further highlighted the role that biology and evolution had in affecting criminal behaviour. arguing that criminals could be distinguished through there specific traits making a shift into understanding biology in relation to crime
What is the sheldon’s somatotype theory?(physilogical)
- He said there was 3 somatotypes(body types)
- ectomorph - they are rounded, soft and tended to fat. Relaxed,social and outgoing personality
Endomorph - They are thin and fragile, they lack muscle and fat. Flat chested with narrow hips and shoulders, thin face and high forehead. Self concious, fragile, inward looking, emotionally restrained and thoughtful - Mesomorph -They are muscular and hard bodied, little fat and strong limbs. They have nroard shoulders with a narrow waist. There personality is adventurous, sensation seeking, assertive and domineering and they also enjoy physical activity
- he had then said mespomorph are most likely to be commiting crime because they like risk taking there strong physique and assertiveness would be great for commiting crimes