Leo is 21 years old, exceptionally tall, and has a very athletic build. He has been in and out of trouble with the justice system since his mid-teens.
When Leo was young, he was much slower to develop fluent speech than his older brother. Throughout primary and secondary school, Leo found it hard to stay focused and was frequently disciplined for being hyperactive and disruptive. He was a keen member of the local youth basketball club but was permanently excluded after physically confronting a referee. As a teenager, Leo was prone to sudden outbursts of temper and physical fights. He left school at 16 with below-average exam results, which frustrated his parents as his brother had easily transitioned to university.
Leo has recently been arrested following a physical altercation during a attempted shoplifting incident. His mother believes his aggressive tendencies are down to his biological makeup, whereas his father argues that Leo has simply structuralised' the 'troublemaker' label he was given by teachers and police when he was younger.
Evaluate XYY syndrome as an explanation of Leo's behaviour.
You must make reference to the context in your answer.
120 exam-style questions on Edexcel A Level Psychology Content, covering Biological explanations of crime, Social explanations of crime, Cognitive and ethical interview techniques, Psychological formulation of offending, Cognitive-behavioural treatment for offenders, Biological treatment for offenders, Factors influencing eye-witness testimony, Factors influencing jury decision-making, Individual differences, and Developmental psychology. Each one has a worked solution and a mark scheme showing where the marks go.