Definition
Criminal behavior refers to acts that violate criminal statutes — but for the forensic psychologist the more interesting question is what produces those acts. Modern research treats offending not as the expression of a fixed disposition (a 'criminal type') but as the outcome of interacting developmental, social, situational, and cognitive processes that vary over the life course.
The empirical regularities are striking: most people who commit crime do so briefly in adolescence and stop; a small minority offend persistently across the life course; offending is heavily skewed by age, sex, and social context; and the same individuals tend to commit a wide range of offences rather than specialising. These patterns rule out simple explanations and require multi-level theories.
Why it matters
Where it shows up
Understanding criminal behaviour drives prevention (early-years programmes targeting parenting and school readiness), policing (hot-spots, situational design), sentencing (risk assessment), and rehabilitation (cognitive-behavioural treatment targeting thinking patterns and self-regulation).