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6. XYY Syndrome
About this Lecture
In this sixth and final module, we think about XYY syndrome, focusing in particular on: (i) the role that a Y chromosome plays in deciding that a person is male; (ii) the speculated ability of an additional Y chromosome to ‘hypermasculate’ a man; (iii) the disproportionate commonality of XYY men in offender populations, but not the expected trend for them to have committed violent offences; (iv) how learning difficulties associated with XYY syndrome may act as a moderator for the relationship between the syndrome and criminal actions.
This course, by Professor Ciarán O’Keeffe (Buckinghamshire New University), explores biological explanations for offending. In the first module, we think about the concept of ‘making a criminal’ and the transition from philosophical to scientific methodologies. In the second module, we think about biological strategies for preventing criminal behaviour, including nutritional interventions and facial surgery for criminals. In the third module, we think about the Raine et al. (1997) study, which identified brain areas linked to violence and aggression. Next, we think about the Haney et al. (1973) study, also known as the Stanford Prison Experiment, run by Philip Zimbardo. In the fifth module, we think about how brain injury can influence violence and aggression, as well as the ability for brain injury research to inform our understanding of this field. In the sixth and final module, we think about XYY syndrome and the mixed results research on it have found regarding its impact on violence, aggression and criminal behaviour.
Ciarán O’Keeffe is associate professor at Buckinghamshire New University. He specialises in both forensic and criminal psychology, as well as parapsychology (the study of mental phenomena which are inexplicable by conventional psychology). Professor O’Keeffe’s background is in investigative psychology and now teaches across a range of forensic and criminal psychology courses. He has made numerous television and radio appearances alongside an array of celebrities.
Cite this Lecture
O'Keeffe, C. (2022, April 01). Forensic Psychology – Biological Explanations for Offending - XYY Syndrome [Video]. MASSOLIT. https://www.massolit.io/courses/forensic-psychology-biological-explanations-for-offending/xyy-syndrome
O'Keeffe, Ciarán. "Forensic Psychology – Biological Explanations for Offending – XYY Syndrome." MASSOLIT, uploaded by MASSOLIT, 01 Apr 2022, https://www.massolit.io/courses/forensic-psychology-biological-explanations-for-offending/xyy-syndrome