Personality traits and criminal behaviour

Personality refers to unique patterns of thoughts, feelings, and behaviours. In the context of criminal behaviour, certain personality traits have been linked to a higher likelihood of engaging in antisocial acts, as demonstrated by Eysenck's theory.

Eysenck's theory of personality

Hans Eysenck developed a theory that personality can be understood through key dimensions, which he measured using a questionnaire called the Eysenck Personality Questionnaire (EPQ). This tool assesses traits that may predispose individuals to criminal behaviour.

Key dimensions of personality in Eysenck's theory:

• Extraversion - A trait characterised by outgoing, sociable, and excitement-seeking behaviour; high extraversion is associated with risk-taking, which can link to criminal acts.
• Neuroticism - Involves emotional instability, anxiety, and mood swings; individuals high in neuroticism may react impulsively to stress, increasing the chance of criminal responses.
• Psychoticism - Refers to traits like aggression, egocentrism, and lack of empathy; high psychoticism is strongly connected to antisocial and criminal tendencies.

Eysenck suggested that criminal behaviour often correlates with high levels of extraversion, neuroticism, and psychoticism. This occurs because these traits can lead to poor impulse control and a disregard for social norms, making criminal acts more likely in certain situations.

Impulsivity and aggression in criminal behaviour

Impulsivity and aggression are personality traits that show strong associations with criminal acts, as cited by Morley and Hall (2003), demonstrating how individual differences can influence behaviour.

Research on how impulsivity and aggression predict antisocial behaviour

• Morley and Hall (2003) - Identified impulsivity and aggression as personality traits strongly associated with criminal behaviour.
• Holmes et al. (2001) - Focused on violent offenders and their childhood histories. Between 70 and 90 per cent of violent offenders had shown high aggression as young children. Antisocial behaviour between ages 9 and 15 strongly correlated with impulsivity. Early aggression predicts later delinquency and antisocial acts.

These findings emphasise developmental psychology, as traits like impulsivity and aggression often manifest early and can shape long-term behaviour patterns if not addressed.

Self-fulfilling prophecy and its developmental impact

Self-fulfilling prophecy highlights both individual differences and the role of developmental psychology. Not everyone conforms to a given label; some may act oppositely to disprove it.

How self-fulfilling prophecy works in criminal behaviour

Labels, such as being called "troublemaker" or "delinquent," can affect self-perception, especially in developing individuals. A young person's sense of self is still forming, making them more susceptible to others' opinions. This can lead to conforming to negative expectations, but individual differences mean outcomes vary – some may rebel against the label to prove it wrong.

Negative labels do not always produce predictable effects. For example, in schools, pupils are often grouped by perceived ability, which can create self-fulfilling prophecies.

Rogers (1982) study on labelling in education

• Method - Analysed how ability grouping in schools affects pupil performance and behaviour.
• Results - Effects varied: some younger children showed improved performance with positive labels, while older ones might underperform; urban children sometimes benefited, but rural ones showed opposite effects.
• Conclusions - Labels influence development differently based on age, environment, and individual factors, highlighting that not everyone conforms uniformly.

This illustrates how developmental psychology interacts with individual differences – labels can shape beliefs about oneself during key growth periods.

Social learning theory and criminal behaviour

Social learning theory proposes that behaviours, including criminal ones, are acquired through observing and imitating others, rather than being innate. This theory integrates developmental psychology, as learning occurs over time through social interactions, and individual differences arise from varying exposures to role models.

Key principles of social learning theory

Criminal behaviour is seen as a learned set of actions, developed in the same way as any other behaviour, through interaction with various social factors. The theory emphasises social factors in development.

Social factors that influence criminal behaviour development:

• Family influence - Children may learn criminal behaviours from parents or siblings who model them.
• Peer group effects - Prolonged exposure to delinquent friends can normalise antisocial acts.
• Media sources - Television, films, and video games can provide models of violence or crime, potentially leading to imitation if viewed as glamorous or successful.

As a result, criminal behaviour develops through ongoing interactions. Individual differences mean not everyone exposed to these influences becomes criminal.