Psychology · Year 13 · Forensic Psychology · 4.º Período

Biological Explanations of Offending

This topic investigates historical and modern biological theories of crime, including atavistic form, genetics, and neural explanations. Students will debate the ethical implications of biological determinism in the legal system.

TL;DR:Biological explanations of offending explore the idea that some individuals are 'born criminals.' Students examine historical theories like Lombroso's 'atavistic form', the idea that criminals are evolutionary throwbacks, alongside modern genetic and neural research. This includes the role of the MAOA gene, the 'warrior gene,' and brain structures like the prefrontal cortex and amygdala.

• National Curriculum Attainment Targets
• AQA A-level Psychology 7182 - 4.3.8.2
• AQA A-level Psychology 7182 - 4.3.8

About This Topic

Biological explanations of offending explore the idea that some individuals are 'born criminals.' Students examine historical theories like Lombroso's 'atavistic form', the idea that criminals are evolutionary throwbacks, alongside modern genetic and neural research. This includes the role of the MAOA gene, the 'warrior gene,' and brain structures like the prefrontal cortex and amygdala.

This topic is highly controversial and requires students to handle sensitive issues like the ethics of biological determinism. It connects to the broader 'nature-nurture' debate and has profound implications for how the legal system treats offenders. Students grasp this concept faster through structured discussion and peer explanation, where they can debate whether a 'criminal brain' should lead to a lighter sentence or a different type of rehabilitation.

Key Questions

1. What was Lombroso's atavistic form theory and why is it criticised?
2. How do twin and adoption studies support a genetic explanation for crime?
3. What role do mirror neurons and the amygdala play in psychopathy?

Watch Out for These Misconceptions

Common Misconception

Lombroso's theory was purely scientific and objective.

What to Teach Instead

Lombroso's work was heavily influenced by the racial and social prejudices of his time, often labelling non-Western features as 'atavistic.' Peer-led analysis of his work helps students see the importance of historical context and the dangers of 'scientific' racism.

Common Misconception

If you have the 'warrior gene,' you will definitely become a criminal.

What to Teach Instead

Genes only provide a predisposition; environmental factors like childhood abuse are usually required to 'trigger' the behaviour. Using the diathesis-stress model in collaborative tasks helps students avoid the trap of biological determinism.

Active Learning Ideas

Gallery Walk

The History of Biological Criminology

Display images and descriptions of Lombroso's 'atavistic' features alongside modern brain scans of psychopaths. Students move around the room to identify the flaws in historical theories and the potential biases in modern neural research.

40 min·Small Groups

Formal Debate

The Genetic Defence

Divide the class into 'Defence' and 'Prosecution.' The defence must argue that a defendant's genetic makeup (e.g., the MAOA gene) should be a mitigating factor in their sentencing, while the prosecution argues for personal responsibility and the danger of biological excuses.

50 min·Whole Class

Inquiry Circle

Twin and Adoption Studies

Groups are given data sets from famous twin and adoption studies (e.g., Christiansen or Mednick). They must calculate the concordance rates for criminal behaviour and explain what the 'gap' in the data tells us about environmental influences.

35 min·Small Groups

Frequently Asked Questions

What was Lombroso's 'atavistic form' theory?

Cesare Lombroso suggested that criminals were 'evolutionary throwbacks' who lacked the evolutionary development of civilised humans. He claimed they could be identified by physical 'stigmata,' such as a heavy brow, large jaw, or extra nipples. While his work is now seen as scientifically flawed and racist, it was important for moving criminology toward a more scientific, biological basis.

How do neural explanations explain offending behaviour?

Neural explanations focus on brain structure and function. Research has shown that many offenders, particularly those with antisocial personality disorder, have reduced activity in the prefrontal cortex, which is responsible for impulse control and emotional regulation. Other studies suggest abnormalities in the amygdala, which processes fear and empathy, may also play a role.

What is the 'warrior gene' (MAOA)?

The MAOA gene codes for an enzyme that breaks down neurotransmitters like dopamine and serotonin. A low-activity version of this gene has been linked to increased aggression and violent crime. However, research suggests this gene only leads to offending when combined with a traumatic childhood, highlighting the interaction between nature and nurture.

How can active learning help students understand biological explanations of crime?

Active learning, such as debating the 'genetic defence' in a mock trial, forces students to engage with the ethical and practical consequences of biological theories. By applying abstract concepts like 'neural correlates' to a legal scenario, they develop a much deeper understanding of the tension between biology and free will. This leads to more sophisticated evaluative essays in their A-level exams.