Hide Main content block

Home Page News Section

Home Page News Section


    Researcher Giel Ton's work aids evaluation of development impact.
    This implies research to detect outcomes that change in response to a project or a programme, and explore for the conditions that contributed to the realisation of these effects. However, these projects and programmes are always context-dependent. Each ‘effectiveness’ study, has specific characteristics that make their impact ‘unique’, which limits the usefulness of findings to the outside world – the so-called ‘external validity’.

    Read more


    Video presenting policy brief about sentencing
    Howard White tells how our policy brief can help inform policymakers who want to reduce crime, and reform criminals. Up-to-date evidence from meta-analyses shows which criminal justice programs are effective in reducing crime. Formal processing of young offenders and pre-court disposals managed by the police, which divert offenders from the criminal justice system rather than prosecuting them, can lead to reduced re-offending. Read our policy brief called "The effects of sentencing policy on re-offending."

    Read more

  • John Westbrook Memorial Fund

    Support Knowledge Translation and Implementation
    John Westbrook was a leading disability researcher who was active in promoting the use of evidence. His bequest to the Campbell Collaboration to support our work in the area of knowledge translation has been used to create the John Westbrook Memorial Fund.This fund will support the John Westbrook Prize which is awarded annually in recognition of outstanding contributions to knowledge translation (KT), and the dissemination and implementation of evidence.

    Read more

  • Submit your abstract for GEIS 2018-closing April 29!

    Global Evidence and Implementation Summit 2018
    Submitting your abstract provides an opportunity to profile experience from across Australasia and worldwide. GEIS 2018 is a global, cross-sector event, and we invite submissions from around the world, and from a broad range of sectors. Join us in Melbourne, 22-24 October. Need a bursary? Nationals of a developing country, who live and work in that country and have their abstract accepted can apply for a bursary from June 15.

    Learn more 


Home Page Latest Campbell Evidence

Home Page Featured Review


Featured Review

boySchool-based interventions for reducing disciplinary school exclusion by Sara Valdebenito, Manuel Eisner, David P. Farrington, Maria M. Ttofi, Alex Sutherland.

School exclusion, also known as suspension in some countries, is a disciplinary sanction imposed by a responsible school authority, in reaction to students’ misbehaviour. Exclusion entails the removal of pupils from regular teaching for a period during which they are not allowed to be present in the classroom (in-school) or on school premises (out-of-school). In some extreme cases the student is not allowed to come back to the same school (expulsion). 

School exclusion is associated with undesirable effects on developmental outcomes. It increases the likelihood of poor academic performance, antisocial behavior, and poor employment prospects. This school sanction disproportionally affects males, ethnic minorities, those who come from disadvantaged economic backgrounds, and those with special educational needs. Interventions to reduce school exclusion are intended to mitigate the adverse effects of this school sanction. Some approaches, namely those involving enhancement of academic skills, counselling, mentoring/monitoring and those targeting skills training for teachers, have a temporary effect in reducing exclusion. More evaluations are needed to identify the most effective types of intervention; and whether similar effects are also found in different countries. 

What is this review about?

This Campbell systematic review examines the impact of interventions to reduce exclusion from school. The review summarises findings from 37 reports covering nine different types of intervention. Most studies were from the USA, and the remainder from the UK.

Read More



Contact Us

  • P.O. Box 222, Skøyen ,
    N-0213 Oslo, Norway
  • (+47) 21 07 81 00
  • (+47) 23 25 50 10
  • Web: tkristiansen@campbellcollaboration.org
  •  info@campbellcollaboration.org