Evaluation Library

Our aim is to provide youth justice professionals with accessible, relevant and objective information about the range of programmes in use across the youth justice system. The Evaluation Library is the YJB's collection of appraised youth justice interventions. The strength of the evidence has been evaluated and is classified into one of four categories based on the methods used:

  • No Classification
  • Level 1
  • Level 2
  • Level 3

These ratings may help inform a user’s decision of whether to adopt the practice.

Library Classification Levels

No Classification:

This is for those awaiting classification.

Level 1 – Theory of effectiveness

This classification level articulates what an intervention aims to do and how it relates to youth justice outcomes such as reducing offending and reoffending, reduction in first-time entrants, and reducing the number of young people in custody.

In these articles, there may not yet be any clear evidence of impact. The intervention should have an underpinning ‘theory of change’.

Level 2 – Preliminary evidence of effectiveness

Interventions at this level meet the Level 1 but also include evidence of the impact of the intervention. This will probably comprise a pre/post measure on key outcomes: a robust comparison group is not essential for inclusion at this level.

The evidence within these papers also includes clear description of the context in which the approach/intervention operates.

Level 3 – Robust evidence of effectiveness

Level 3 provides the most robust examples of evidence. These evaluated interventions are distinguished from those at Level 2 by the ability to say with greater confidence that the approach/intervention is likely to have produced the observed.  This may mean that alternative explanations for positive changes can be rules out.

More details of the categorization used are provided in Standards of Evidence (please note the classification used will be revised shortly following the publication of the new Magenta book).  

The Magenta Book published 01/04/2020 is the recommended central government guidance and presents standards of good practice in conducting evaluations.

The YJB welcomes new additions to its ‘Evaluation Library’. Please email your evidenced interventions to effectivepractice@yjb.gov.uk along with your rationale for inclusion.

Summary: An approach to working with children with experience of the youth justice system. Classification: Pending classification     The Welsh Government has published the report Evaluation of the Enhanced Case Management approach. Please note that the link will take you to the Welsh Government site. The Enhanced Case Management (ECM) approach is an approach to working with children with…
Summary:  Attached is the evaluation report concerning the a programme designed top tackle key issues in regards to disproportionality of BAME children in the CJS in Islington and Haringey YOTs. Classification:  Not applicable.     Description:  The evaluation attached below, ‘The Disproportionality Project: Addressing issues relating to the disproportionately high representation of Islington’s and Haringey’s BAME young people in the…
Summary: mentoring programme for children involved in serious youth violence.Classification: not applicable, but it has a Theory of change.Age: 10-17Sex: n/aCost: Yes     Aims: Encourage positive lifestyle choices, by challenging and changing attitudes and values that contribute to serious youth violence and gang participation.   Description:Spark2Life have developed an 8 to 10 week package to help tackle some of…
Summary: Youth Restorative Intervention is designed to provide a restorative approach when working with children who have committed low level offences. Classification: Level 3 Age: 10-17 Sex: n/a Cost: n/a     Aims: To improve the experience of justice for all concerned To create an opportunity at an early stage for harm to be repaired To increase victim satisfaction To…
Summary: Evaluation of a YOT run programme around a highly responsive intervention process for young children who have offended. Classification: Level 3 Age: 7 upwards Sex: n/a Cost: n/a     Intended Outcomes: The intended outcomes are that policy makers, managers and practitioners are made aware of the evidence base and the successful outcomes of the Preventing Youth Offending Project…
This guide describes the YJB Standards of Evidence that it uses to classify submissions made by practitioners to the evaluation library. The aim of the guide is to describe how the YJB, and its Effective Practice Classification Panel will assess the evidential strength of submissions of evidenced based practice. In doing so it also provides a guide to inform those…
Summary: Take 3 is an evidence-based parenting programme Classification: Level 2 Age: n/a Sex: n/a Cost: n/a     Aims: Improve relationships between young people and their families Improve young people’s behaviour at home, at school and in the wider community Support parents to set appropriate boundaries Support parents to value themselves and increase self esteem   Description: Take 3…
Summary:  Findings from the pilot 2015-2016 concerning usage of skype in Parc Youth Offender Insitute. Classification: Pending classification.     Aims The Youth Justice Board’s objectives of running the Skype pilot in Parc Young Offender Institution (YOI) were to: Establish whether internet based video solutions (IBVS) could improve links between children in custody, their families and resettlement agencies; Test whether…
Summary: Research examining the implementation and operation of the Whole System Approach. Classification: Pending classification.     The Whole-System Approach (WSA) is an evidence-informed youth justice strategy for children and young people who offend introduced nationally in Scotland in 2011, following a year-long pilot of the approach in Aberdeen. This research aimed to examine the implementation and operation of the…
Summary:  Youth Justice Liaison and Diversion scheme  were created to enhance health provision within the youth justice system. Classification: Level 2 Age: 10-18 Sex: n/a Cost: n/a     Aims: To improve early identification, of young people, at the point of entry into the youth justice system – YJS- (usually the police custody suite with mental health, learning, communication difficulties…
Summary: Triple P is a programme designed to support and equip parents with the skills and confidence to manage their family's issues without ongoing support. Classification: Level 3 Duration: Individual Age: 12-16 Sex: n/a Cost: Yes     Aim: Support and equip parents with the skills and confidence to manage their family’s issues without ongoing support Reduce stress in parents…
Summary: Triage is a process to support diverting children out of the criminal justice system. Classification: Level 2 Age: 10-17 Sex: n/a Cost: yes     Aim: The aim of Triage is to prevent inappropriate criminalisation of children for low level offences, and instead delivering restorative interventions.     Description: Triage is the process of determining the priority of a…
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