Welcome to Criminological Psychology!
Ever wondered why some people turn to a life of crime while others don’t? Or why witnesses sometimes remember things that never actually happened? That is exactly what Criminological Psychology is all about. We’ll look at the biological and social reasons for crime, how we treat offenders, and how psychology helps (or sometimes hinders) the courtroom process. Don’t worry if this seems a bit heavy at first—we’re going to break it down into bite-sized, easy-to-digest pieces!
1. Why Do People Commit Crimes? (Explanations)
Psychologists look at crime from two main angles: Nature (Biology) and Nurture (Society/Learning).
A. Biological Explanations
These suggest that something inside the person’s body or brain makes them more likely to be criminal.
- Brain Injury: Damage to the Pre-frontal Cortex (the part of the brain that controls impulses and "moral" behavior) can make someone more aggressive or unable to control their temper. Think of it like a car with no brakes.
- The Amygdala: This is a tiny, almond-shaped part of the brain that processes fear and emotion. If it’s overactive, a person might react with too much aggression. If it’s underactive, they might not feel fear or empathy.
- XYY Syndrome: A rare genetic pattern where a male has an extra Y chromosome. In the past, people thought this made men "super-aggressive," but modern research shows most XYY men are not violent, though they may have learning difficulties.
- Personality (Eysenck’s Theory): Hans Eysenck argued that criminals often have high levels of Extraversion (seeking thrills), Neuroticism (being emotionally unstable), and Psychoticism (lacking empathy).
B. Social Explanations
These suggest that the environment and the people around us "create" a criminal.
- Labelling: This is when society gives someone a "tag" (e.g., "troublemaker"). Once someone is labelled, people treat them differently, which can lead the person to accept that label.
- Self-Fulfilling Prophecy (SFP): This happens in four steps:
1. An expectation is set (e.g., a teacher thinks a student is a thief).
2. The person is treated according to that expectation.
3. The person reacts to that treatment.
4. The original expectation becomes true because the person actually commits the crime. - Social Learning Theory (SLT): We learn to be criminal by observing and imitating role models (like parents or older siblings) who get rewarded for their bad behavior.
Quick Review: Nature vs. Nurture
Biological: It’s in the brain/genes (Nature).
Social: it’s about labels and what we learn (Nurture).
2. Understanding the Offender
Once a crime is committed, how do police and psychologists deal with the suspect?
The Cognitive Interview (CI)
Standard police interviews can be stressful and lead to bad memory. The Cognitive Interview is a set of four techniques designed to help witnesses remember more without making things up:
- Mental Reinstatement: The witness imagines they are back at the scene (the weather, the smells, their feelings).
- Report Everything: The witness tells every single detail, even if it seems unimportant.
- Change Order: The witness describes the event backward (from end to start) to prevent them from "filling in the gaps" with what they expected to happen.
- Change Perspective: The witness imagines the scene from someone else’s view (e.g., the victim or another bystander).
Memory Aid: Use the mnemonic MR. OC (Mental Reinstatement, Report everything, Order change, Context/Perspective change).
Psychological Formulation
This is like a "map" psychologists draw for an individual offender. It looks at their life history, their triggers, and why they committed a specific crime. It helps decide the best way to rehabilitate them.
3. Treating the Offender
We don’t just want to punish criminals; we want to stop them from doing it again!
A. Cognitive-Behavioural Treatment (CBT)
Example: Anger Management. This helps offenders recognize the physical signs of anger (like a racing heart) and gives them "tools" to calm down before they lash out.
Pros: It gives the offender long-term skills.
Cons: It requires the offender to be motivated to change.
B. Biological Treatment
Example: Dietary changes. Some research suggests that high sugar or chemical additives can make people more impulsive. Giving offenders a healthier diet or vitamin supplements (like Omega-3) can sometimes reduce aggression.
Pros: Easy to implement in a prison setting.
Cons: It doesn't fix the social reasons why they became a criminal in the first place.
4. Eye-Witness Testimony (EWT)
Did you know? Eye-witness testimony is the most common reason for wrongful convictions. Human memory is not like a video recorder; it is reconstructive.
Factors Affecting Reliability:
- Post-Event Information: Information given after the event (like a leading question) can change the original memory.
- Weapon Focus: If a criminal has a gun or knife, the witness often stares at the weapon because it’s a threat. This means they don't look at the criminal's face, making their description unreliable.
5. Jury Decision-Making
A jury is supposed to be objective, but psychologists have found several biases that affect their decisions:
- Defendant Characteristics:
- Attractiveness: "What is beautiful is good." Juries are often more lenient toward attractive defendants (the Halo Effect).
- Race and Accent: Defendants from ethnic minorities or those with "rough" regional accents are sometimes judged more harshly due to stereotypes. - Pre-Trial Publicity: If the media has already labelled someone "guilty" before the trial starts, it’s very hard for a jury to remain fair.
6. Key Studies you NEED to know
Classic Study: Loftus and Palmer (1974)
They showed students clips of car accidents and asked them "How fast were the cars going when they [verb] each other?"
- If the word was "Smashed," students estimated much higher speeds.
- If the word was "Hit," estimates were lower.
Key Takeaway: One single word can change a person's memory of an event!
Contemporary Study: Valentine and Mesout (2009)
This was the famous "London Dungeon" study. They measured visitors' heart rates as they walked through a scary attraction.
- People who were the most stressed (highest heart rate) were the worst at identifying a "scary actor" they met in the dungeon.
Key Takeaway: High stress makes eye-witnesses less accurate.
7. Issues and Debates in Criminology
When writing your long essays, keep these "Big Ideas" in mind:
- Ethics: Is it fair to label someone a "criminal" based on their brain scan? Is it ethical to use "mock juries" in research?
- Reductionism: Biological explanations are often reductionist because they blame a complex behavior (crime) on one tiny part of the brain or a single gene.
- Psychology as a Science: Lab experiments (like Loftus and Palmer) are very scientific but might not represent real life (low ecological validity). Field experiments (like the London Dungeon) are more realistic but harder to control.
- Social Control: Using treatments like anger management can be seen as a way for the government to "control" how people think and feel.
Summary Table: Common Mistakes to Avoid
Don't say: "XYY Syndrome makes you a murderer."
Do say: "Early research suggested a link, but modern studies show XYY males are generally not more violent than others."
Don't say: "Memory is like a photo."
Do say: "Memory is reconstructive and can be altered by leading questions."
Final Takeaway
Criminological psychology shows us that crime isn't just "good vs. evil." It’s a mix of brain chemistry, life experiences, and social labels. In the courtroom, the biggest takeaway is that we should be careful—human memory and judgment are much more fragile than we think!