AQA A-level Psychology (7182): Paper 3 – Forensic Psychology – Study Guide

This guide covers Forensic Psychology for AQA A-level Psychology (7182), following the AQA AS and A-level Psychology (7181, 7182) specification, Version 1.4 (1 September 2025), for teaching from September 2025. Forensic Psychology is section 4.3.9 of that document and topic 16 in Option 3 of the A-level content. It is assessed in Paper 3: Issues and Options in Psychology, Section D.

Use it with the Forensic Psychology revision notes and the Forensic Psychology practice questions. The 7182 course hub and the 7182 checklist show the whole course.

How Paper 3 works

The specification prints Paper 3 like this:

• What’s assessed: compulsory content 8 (Issues and debates in Psychology); optional content, “one from option 1, 9–11, one from option 2, 12–14, one from option 3, 15–17”.
• Written exam: 2 hours; 96 marks in total; 33.3% of A-level.
• Section A: multiple choice, short answer and extended writing, 24 marks.
• Section D: “one topic from option 3, 15–17 above, multiple choice, short answer and extended writing, 24 marks”.

Option 3 is Aggression (15), Forensic Psychology (16) and Addiction (17). If your school teaches Forensic Psychology, you answer it in Section D. Which option your class takes is a school decision; your teacher will confirm it.

Section 4.3 also says you must be able to apply Paper 3 content “in a range of contexts”, evaluate it, and “evaluate therapies and treatments including in terms of their appropriateness and effectiveness”. Research methods and maths skills are assessed in Paper 3 too.

Coverage table

Syllabus reference (4.3.9)	What you must know or be able to do	Where assessed
Offender profiling	The typology approach, including organised and disorganised types; the data-driven approach, including investigative Psychology; geographical profiling	Paper 3, Section D
Biological explanations of offending behaviour	Genetics and neural explanations	Paper 3, Section D
Psychological explanations of offending behaviour	Eysenck’s theory of the criminal personality; cognitive explanations: level of moral reasoning and cognitive distortions, including hostile attribution bias and minimalisation; differential association theory	Paper 3, Section D
Dealing with offending behaviour	Aims and psychological effects of custodial sentencing; behaviour modification in custody; anger management and restorative justice programmes	Paper 3, Section D

Offender profiling

Offender profiling is an investigative tool. It uses crime-scene evidence to narrow down the likely characteristics of an unknown offender.

The typology approach

The typology (top-down) approach was developed by the FBI’s Behavioral Science Unit. Ressler, Burgess and Douglas (1988) drew on interviews with 36 convicted sexually motivated murderers. Profilers match a crime scene to a pre-existing type:

• Organised offenders plan the crime, select a victim, keep control, leave few clues and often bring and remove a weapon. They tend to be of average or higher intelligence and socially competent.
• Disorganised offenders show little planning. The scene looks spontaneous, with evidence such as the weapon or the body left behind. They tend to have lower intelligence, live alone and live near the crime.

The process has four stages: data assimilation, crime scene classification, crime reconstruction and profile generation.

Evaluation. The original sample was small and based on self-report from offenders, who may have lied or exaggerated. Canter et al. (2004) analysed 100 US serial murders and found organised features were common across most cases, but found no clearly separate disorganised type. The approach was designed for crimes such as murder and rape, where the scene reveals a lot; it fits property crime poorly. On the other hand, the typology is simple and quick to apply.

The data-driven approach: investigative psychology

The data-driven (bottom-up) approach builds a profile from statistical analysis of databases of past crimes. Investigative psychology, associated with David Canter, looks for patterns using techniques such as smallest space analysis. Key ideas:

• Interpersonal coherence: the way an offender behaves towards a victim may reflect how they treat people in everyday life.
• Significance of time and place: where and when crimes happen may reveal the offender’s home base and routine.
• Forensic awareness: offenders who cover their tracks may have been through the justice system before.

Evaluation. The approach is more objective than the typology because it rests on data rather than intuition. It can be applied to a wider range of crimes, including burglary. However, databases contain solved crimes only, so the patterns may not represent offenders who are never caught. Copson’s (1995) survey of UK police officers found profiles were often seen as useful but rarely led directly to identifying the offender.

Geographical profiling

Geographical profiling uses the locations of linked crimes to predict where the offender is likely to live or work. Canter’s circle theory distinguishes:

• Marauders, who commit crimes close to home, inside the circle drawn through their two furthest crimes.
• Commuters, who travel away from home to offend.

Kim Rossmo developed criminal geographic targeting, which uses crime locations to estimate the most likely area of the home base.

Evaluation. Lundrigan and Canter (2001) studied body-disposal sites in serial murder cases and found the offender’s home was often near the centre of the sites. A limitation is that location is only one source of evidence; it does not tell police who the offender is, so it works best combined with other methods.

Worked paragraph. Knowledge: Investigative psychology uses statistical analysis of crime databases. Application: For a series of burglaries in which the offender wipes surfaces, the police might infer forensic awareness and search records of people with previous burglary convictions. Analysis: This narrows the suspect pool using patterns from real cases. Evaluation: But databases contain only solved crimes, so an offender who has never been caught may not fit.

Biological explanations of offending behaviour

Genetic explanations

Genetic explanations suggest some people inherit a predisposition that raises the risk of offending.

• Twin studies. Lange (1929) found higher concordance for criminality in MZ than DZ twin pairs, though the sample was small. Christiansen (1977) studied over 3,500 Danish twin pairs and found about a third of male MZ pairs were concordant for criminality, much higher than for DZ pairs.
• Adoption studies. Mednick et al. (1984) studied 14,427 Danish adoptees. When neither biological nor adoptive parent had a conviction, 13.5% of adoptees had a conviction. The figure was 20% when only the biological parent had one and 24.5% when both did.
• Candidate genes. Tiihonen et al. (2015) studied Finnish prisoners and linked two genes, MAOA and CDH13, to extremely violent offending. MAOA is covered in Aggression.

The diathesis-stress model proposes that a genetic predisposition (diathesis) leads to offending only when combined with environmental triggers (stress), such as a harsh upbringing.

Evaluation. Concordance rates in twin studies are never 100%, so genes cannot be the whole explanation. MZ twins also share more similar environments than DZ twins, which inflates genetic estimates. Adoption studies help separate genes from upbringing, but children are often placed in homes similar to their biological family. The explanation raises a free will and determinism issue: if offending were genetically determined, could an offender be held responsible?

Neural explanations

Neural explanations focus on differences in brain structure and function.

• Prefrontal cortex. This area helps regulate emotion and control impulses. Raine et al. (1997) used PET scans on 41 people charged with murder who pleaded not guilty by reason of insanity and 41 matched controls. The murderers showed lower activity in the prefrontal cortex.
• Antisocial personality disorder. Raine et al. (2000) used MRI and found people with antisocial personality disorder had about 11% less prefrontal grey matter than controls.
• Mirror neurons. Meffert et al. (2013), from Christian Keysers’ group (sometimes cited as Keysers et al., 2011), scanned 18 offenders with psychopathy. Watching others’ hand interactions, they showed less empathy-related activity than controls, but the difference largely disappeared when told to empathise. Empathy may be “switched off” rather than absent.

Evaluation. Brain differences are correlational. A brain difference may be a result of experiences such as abuse or head injury, not a cause of offending. The research is also reductionist: it reduces complex behaviour, shaped by poverty and peers, to brain function. However, it has real-world value, for example in debates about responsibility in court.

Psychological explanations of offending behaviour

Eysenck’s theory of the criminal personality

Eysenck proposed that personality varies on three dimensions measured by the Eysenck Personality Questionnaire (EPQ):

• Extraversion (E): extraverts have an underaroused nervous system, so they seek excitement and risk.
• Neuroticism (N): neurotic people are emotionally unstable and react strongly to threat.
• Psychoticism (P): high P is linked to being cold, aggressive and lacking empathy.

The typical criminal personality is high on all three. Eysenck argued these traits have a biological basis, and that offending results from poor socialisation: high E and high N individuals are harder to condition, so they learn the link between wrongdoing and punishment less well.

Evaluation. Eysenck and Eysenck (1977) found prisoners scored higher on E, N and P than non-prisoners. However, Farrington et al. (1982) reviewed studies and found offenders scored consistently high on P, but not consistently high on E. Bartol and Holanchock (1979) found Hispanic and African-American offenders in a New York prison were less extraverted than a control group, suggesting cultural bias. Personality may also not be a stable trait across situations.

Cognitive explanations: level of moral reasoning

Kohlberg described three levels of moral reasoning, each with two stages:

• Pre-conventional (stages 1 and 2): avoiding punishment; gaining rewards.
• Conventional (stages 3 and 4): gaining approval; upholding laws and social order.
• Post-conventional (stages 5 and 6): social contract and individual rights; universal ethical principles.

Offenders are thought more likely to reason at the pre-conventional level. They may offend if they think they can avoid punishment or gain reward.

Evaluation. Palmer and Hollin (1998) found offenders showed less mature moral reasoning than non-offenders. However, moral reasoning does not always predict moral behaviour. Gilligan (1982) argued Kohlberg’s scale is androcentric because it was built on male participants and favours justice over care, which links to gender bias.

Cognitive explanations: cognitive distortions

Cognitive distortions are faulty, irrational ways of thinking that help offenders justify their behaviour.

• Hostile attribution bias: seeing ambiguous actions as aggressive. Schönenberg and Jusyte (2014) found violent offenders were more likely than controls to see anger in ambiguous facial expressions.
• Minimalisation: downplaying the seriousness of an offence, for example describing a burglary as “just borrowing”. Barbaree (1991) reported that many incarcerated rapists denied the offence entirely and many others minimised the harm caused.

Evaluation. The idea has practical value: cognitive behavioural programmes in prisons target distortions directly. A limitation is that distortions may be stronger for some crimes than others, and it is unclear whether they cause offending or develop afterwards to justify it.

Differential association theory

Sutherland’s differential association theory proposes that offending is learned through interaction with others, especially close groups such as family and friends. A person becomes an offender when they are exposed to more attitudes favourable to breaking the law than unfavourable. They learn both the attitudes and the techniques of crime.

Evaluation. Osborn and West (1979) found that sons of convicted fathers were more likely to be convicted than sons of non-criminal fathers. The theory also explains white-collar crime, which other theories struggle with. However, the shared family environment could also reflect shared genes. The ratio of attitudes is hard to measure, so the theory is difficult to test scientifically.

Compare the learning mechanisms with the behaviourist and social learning approaches and the wider Approaches in Psychology guide.

Dealing with offending behaviour

Custodial sentencing

The four aims of custodial sentencing are:

• Deterrence: individual (putting off the offender) and general (sending a message to society).
• Incapacitation: protecting the public by removing the offender.
• Retribution: making the offender pay for the crime.
• Rehabilitation: helping the offender change so they do not reoffend.

Psychological effects include stress and depression, a raised risk of self-harm, institutionalisation (finding it hard to function outside prison) and prisonisation (adopting the norms of prison culture, a term from Clemmer, 1940). Reoffending after release is common, which challenges the deterrence and rehabilitation aims. Effects vary between individuals.

Behaviour modification in custody

Token economies apply operant conditioning. Staff identify target behaviours, such as following rules, and reward them with tokens (secondary reinforcers) that can be exchanged for privileges. Behaviour may be shaped in small steps.

Evaluation. Hobbs and Holt (1976) found token economies improved behaviour among young offenders compared with a group without tokens. Programmes are cheap and easy for staff to run. However, gains often fade after release, when tokens stop. Some argue it is unethical to make basic privileges conditional.

Anger management

Anger management is a cognitive behavioural therapy. Novaco’s (1975) model has three stages: cognitive preparation (identifying triggers), skill acquisition (techniques such as relaxation and assertiveness) and application practice (role-play).

Evaluation. Ireland (2004) reported improvements in young offenders after a programme compared with a control group. It tackles the cause, not just the behaviour. However, role-play may not match real situations, and many studies measure short-term change rather than long-term reoffending.

Restorative justice

Restorative justice brings the offender and victim together, usually with a trained mediator. The offender hears the impact of the crime and takes responsibility; the victim can have a voice and receive reparation.

Evaluation. Sherman and Strang (2007) reviewed studies and found restorative justice reduced reoffending for some offenders, and that it worked more consistently with violent crime than with property crime. Victims often report satisfaction. However, it relies on the offender admitting guilt and the victim agreeing. Meeting the offender could cause the victim further distress, and some see it as a soft option.

Worked paragraph. Knowledge: Restorative justice lets the victim explain the harm caused. Application: A young person who vandalised a neighbour’s car hears how the repair cost affected the family. Analysis: This may weaken minimalisation, because the offender can no longer tell themselves “it was only a car”. Evaluation: Sherman and Strang (2007) found it worked more consistently with violent crime than with property crime, so the benefit for this offence is less certain.

Common errors

• Calling the typology approach “bottom-up”. It is top-down: it starts from pre-existing types.
• Describing the FBI sample as large. It was 36 interviewed offenders.
• Treating concordance rates as proof of genetic causes, ignoring shared environments.
• Mixing up hostile attribution bias (misreading others’ intentions) and minimalisation (downplaying one’s own offence).
• Listing Eysenck’s three dimensions without explaining socialisation and conditioning.
• Confusing token economy (operant conditioning) with anger management (cognitive behavioural).
• Writing that restorative justice replaces sentences in all cases. Describe how it works; do not invent policy.
• Forgetting AO3 in essays: every study needs a “so what?” comment.

Next steps

Test yourself with the practice questions and condense with the revision notes. Review biological and learning ideas in the Approaches practice set.

Official syllabus

This guide follows the AQA AS and A-level Psychology (7181, 7182) specification, Version 1.4 (1 September 2025), for teaching from September 2025, section 4.3.9 Forensic Psychology and the Paper 3 assessment structure.