Prevention of Juvenile Delinquency (Unit IX)

For much of the twentieth century, juvenile justice reacted to delinquency after it happened, processing a child through a court model borrowed from adult criminal procedure. Policy shifted from the 1970s onward on the argument that formal processing is costly, that justice contact is itself a risk factor through labelling and peer contagion, and that risk factors are identifiable early enough to act before a first offence.

The clearest international statement of this shift is the United Nations Guidelines for the Prevention of Juvenile Delinquency, adopted by the General Assembly in 1990 and commonly called the Riyadh Guidelines. NTA examiners treat this instrument as a standard reference point, so know the name, the year and the core idea: prevention plans should span family, education, community and media, not just police and courts.

The organising model borrows from public-health disease prevention and sorts interventions by how narrowly they are targeted. Primary prevention reaches an entire population without screening anyone for risk first, such as a universal social-skills curriculum taught to every student in a grade: cheap per head, broad reach, modest effect for any one child because most recipients were never going to offend.

Secondary prevention targets children already showing elevated risk, identified through screening or teacher referral, before any formal offence, such as structured mentoring for a child flagged for chronic truancy. Tertiary prevention targets children who have already offended, and its goal shifts from stopping a first offence to stopping a repeat one; diversion schemes and restorative conferences sit here. A single case can be sorted by asking who receives the measure and when, not by how the programme is described.

Longitudinal cohort studies, most influentially the Cambridge Study in Delinquent Development, established that delinquency risk clusters across individual, family, peer, school and community domains rather than arising from one cause. Individual-level risks include low self-control and weak school attachment; family-level risks include harsh or inconsistent discipline and poor parental supervision; peer-level risk centres on association with delinquent peers in early adolescence.

Protective factors buffer risk rather than simply being its absence. A stable bond with at least one competent, caring adult is the factor most consistently identified across resilience studies, and school connectedness and neighbourhood collective efficacy have each been linked to lower delinquency independent of academic performance or poverty level. NTA questions on this bullet often pair a risk-factor domain with its matching protective factor.

Programme families with a strong evaluation base include home-visiting programmes for at-risk mothers, school-based social-skills curricula, mentoring programmes, and diversion. Diversion keeps a first-time or low-risk child out of formal court processing and into a community-based or restorative alternative, on the rationale that formal contact itself risks labelling a child and exposing them to more delinquent peers.

Evaluation research has also flagged interventions that sound plausible but perform poorly. The best documented example is Scared Straight style deterrence programmes, which take at-risk youth into adult prisons for confrontational sessions with incarcerated adults. A Campbell Collaboration systematic review of the randomised evaluations found participants reoffended more than untreated control groups, not less. This is a standard MCQ trap: an intuitive-sounding measure with evidence pointing the opposite way.