Intervention Tool Overview
Make confident decisions using the best available evidence for homelessness interventions
This tool provides a single, accessible and trusted entry-point to the current body of evidence for homelessness interventions. The tool provides one-page overviews of all the available evidence, including simple ratings for the strength of evidence, cost-effectiveness and impact, as well as detail on what the studies say about each intervention. Use this tool as a trusted starting point for making evidence-informed decisions.
USE THIS TOOL TO
Review one page summaries of common interventions
Access evidence for what interventions work and why
Access evidence for what interventions work and why
Explore the interventions
Take a look at everything we know about the current body of homelessness intervention evidence.
Evidence standards
We apply standards of evidence to each of our tools and maps, which have been co-developed with our partners, The Campbell Collaboration.
Each intervention in the tool has a rating for strength of evidence, cost effectiveness and impact. These ratings represent an aggregate of the studies that have been conducted for that intervention. The thresholds for the ratings are as follows:
Strength of evidence
Considerable reliable evidence
At least 3 RCTs or 5 other studies with a combined sample size of at least 300
Some reliable evidence
At least 2 RCTs or 3 other studies with a combined sample size of at least 200
Limited reliable evidence
At least 1 RCT or 2 other studies with a combined sample size of 100
Insufficient evidence available
Any other number or combination of studies.
Strength of evidence
To be determined
Strength of evidence
3 or more RCTs showing positive effects. No studies showing adverse effects.
At least one RCT or 2 other studies showing positive effects and no study showing adverse effects.
At least 2 RCTs showing insignificant effects.
At least one RCT or 2 other studies showing negative effects and no study showing positive effects.
3 or more RCTs showing negative effects. No studies showing positive effects.
Insufficient evidence available or any other number or combination of studies and findings.
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