Gough, D; White, H; (2018) Evidence standards and evidence claims in web based research portals. Centre for Homelessness Impact: London, UK.

Text CFHI_EVIDENCE_STANDARDS_REPORT_V15_PRINT.pdf - Published Version Access restricted to UCL open access staff Download (4MB)

Abstract

Executive summary A survey was undertaken for the Centre for Homelessness Impact of 14 English language evidence portals to examine the type of research evidence that they contained and the evidence standards used. It was found that portals predominantly focused on questions on the efficacy of interventions using experimentally controlled studies. Evidence standards were based predominantly on the trustworthiness of individual primary research studies and of the whole of the existing evidence base. The report makes the following recommendations about the use of evidence standards in evidence portals: 1: Specify the aims and methods of making evidence claims and ensure consistency across levels of evidence (guidance, evidence base, included studies). 2: Consider using broad rather than narrow evidence base questions. 3: Use explicit rigorous methods of evidence synthesis to make claims about the existing evidence base. 4: Specify and justify the different evidence standards for making different claims about the existing evidence base including impact, strength, extent and consistency of evidence, process and contexts and costs. 5: Specify and justify evidence standards for included studies. 6: Specify methods as well as criteria for achieving evidence standards. 7: Develop methods and standards for policy and practice guidance informed by the evidence base. These recommendations are considered in relation to CHI’s plans to develop their evidence portal.

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