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Evaluation of XYY Syndrome and Crime (FACTS (Common features of someone…
Evaluation of XYY Syndrome and Crime
SUPPORTING STUDIES
E
Suggested that those with XYY were more aggressive than those with XY = over-representation of XYY men in prisons (15/1000)
E
Leading to a link between XYY syndrome and crime/anti-social behaviours
P
Jacobs et al
COMPLIMENTS AND CRITISICMS
E
Androcentric Research = only using male XYY participants
E
Questions how useful it is as an explanation of crime
P
Includes Problems
OPPOSING STUDIES
E
Found that XYY males had lower levels of intelligence = argued that increased levels of crime may be due to learning difficulties associated with condition rather than condition itself
E
Suggesting that having genotype of XYY may not be a direct course of criminality
P
Theilgaard (1984)
DIFFERENT STUDIES
E
Not everyone with XYY goes onto commit a crime
E
Suggests there must be other explanations and possibilities
P
Unlikely to be one single explanation
APPLICATIONS
E
If syndrome is found early , issues can be addressed (25% are found before birth)
P
:check: Application
E
May prevent Labelling arising from the syndrome and therefore reduce the likelihood of a link with criminality
+
E
XYY syndrome only affects males
E
Therefore, how do we use it to explain women that have committed crimes
P
Cannot account for all crime
E
May be diagnosed before birth = through CVS (tissue sample of placenta)
E
Not all mothers would choose to have a CVS = difficulty when diagnosing
P
Difficulties in identifying individuals with XYY syndrome
FACTS
Only in males
1/1000 get it
It means you have an extra Y chromosome
Common features of someone with XYY chromosomes
Behavioural and emotional difficulties
Taller than others = 7cm taller
Delayed motor skills
Lower IQ