Independent Evidence Synthesis — Health, Psychology, Social Services, & Policy

The evidence base
your decisions
deserve.

We produce rigorous, independent research syntheses for governments, health systems, funders, and policy makers — transforming complex clinical, psychological, and policy literature into clear recommendations and decisions you can defend.

Protocol-registered
Dual-reviewer process
100% independent
Current Engagement
Reviews Delivered
24+
Health & psychology
Studies Screened
40k+
Dual-reviewed records
Active Synthesis
Psychological Interventions for Adolescent Anxiety — Systematic Review
Government Health Department · 1,847 screened
Data extraction 73%
Mental Health Adolescent CBT
Response Time
2 days
Average to first response
Accepting projects
evidence4impact@gmail.com
🏛️
Government Departments
🤲
Philanthropic Organisations
🎓
Universities & Research Institutes
🏥
Health Systems & Policy Makers
Clinical & Public Health

Evidence synthesis for clinical practice, public health programs, prevention strategies, and health system design — from individual treatment efficacy to population-level intervention impact.

Acute CareChronic DiseasePreventionHealth Equity
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Mental Health & Psychology

Rigorous synthesis across psychological interventions, psychiatric care, behavioural health, crisis services, and trauma-informed practice — from individual therapy to system-level reform.

CBTTraumaPsychiatryCrisisWellbeing
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Evidence for Policy & Practice

Translating the best available evidence into clear, defensible recommendations for policy reform, service design, and program investment — bridging research and real-world implementation.

Policy ReformImplementationSocial PolicyEducation
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Evidence for Policy & Practice

From research to reform
evidence that gets used

"The gap between what research shows and what policy does is not a knowledge problem. It is a translation problem — and that is exactly what we solve."

Most evidence reviews produce outputs designed for academic audiences. We produce outputs designed for decision makers — synthesis that is rigorous enough to withstand methodological scrutiny and clear enough to shape a briefing, a funding strategy, or a program redesign.

8+
Policy domains covered
2 wks
Fastest rapid policy scan
100%
Human-led synthesis & judgment
Policy Briefs & Decision Summaries

Complex evidence translated into concise, structured briefs for ministers, executives, and commissioners — read quickly and acted on with confidence.

1–3 weeks
Implementation Evidence Reviews

Synthesis focused on how to implement — not just whether an intervention works, but how, for whom, and under what conditions in practice.

4–10 weeks
Cross-Sector Policy Syntheses

Evidence spanning health, education, social policy, and community services — for reforms that do not fit neatly within a single department's evidence base.

6–14 weeks
Equity-Centred Impact Analysis

Dedicated synthesis of distributional impacts, marginalised populations, and equity gaps — ensuring policy decisions account for those most affected.

4–8 weeks
Services

Every review type. Every
timeline. Every need.

Not sure which? Ask us.
01
Systematic Reviews

Protocol-driven, pre-registered reviews with reproducible search strategies and dual-reviewer screening. The gold standard for policy-critical and clinical questions.

⏱ 8–20 weeks
02
Rapid Reviews

Accelerated evidence synthesis for urgent policy and clinical decisions — structured screening and critical appraisal under real-world time pressure.

⏱ 2–6 weeks
03
Scoping Reviews

Mapping the breadth and nature of evidence in a domain — identifying contested findings, evidence gaps, and priority areas for research investment or policy action.

⏱ 4–8 weeks
04
Meta-analyses

Statistical pooling of clinical effect sizes — precise, interpretable estimates with confidence intervals and heterogeneity analysis for policy and clinical application.

⏱ 10–22 weeks
05
Umbrella Reviews

Synthesis of existing systematic reviews for a high-level field overview — essential for complex policy areas with multiple intervention types and overlapping outcomes.

⏱ 6–14 weeks
06
Evidence Gap Maps

Visual mapping of where evidence exists and where it is absent — supporting funders and policy teams to prioritise research investment and identify knowledge gaps.

⏱ 4–10 weeks
07
Preliminary Evidence Scans

Rapid horizon-scanning to assess whether a full review is warranted and to map the research landscape before committing to a larger synthesis.

⏱ 1–2 weeks
08
Policy Briefs & Clinical Summaries

Decision-ready synthesis for health executives, clinical leaders, and policy teams — clarity and actionability without sacrificing scientific rigour.

⏱ 1–3 weeks
What you receive
Full synthesis report
Executive summary
PRISMA flow diagram
Evidence tables & appendices
Risk of bias assessment
Policy brief (on request)
Pre-registered protocol
Every review includes
Dual-reviewer screening
Independent quality appraisal
Equity lens analysis
Full methodological transparency
Our Model

Human rigour,
intelligently supported

We are fundamentally a human-led organisation. Every synthesis, analytical judgment, and interpretive conclusion is made by specialist researchers — never by algorithm. AI tools assist only in bounded screening logistics, always under close human governance.

"AI assistance means our researchers spend less time on logistics and more time on what only humans can do: judgment, nuance, and accountability."

— Evidence for Impact, Model Principle

100%
Human-led synthesis & interpretation
8+
Review methodologies across the evidence spectrum
Dual
Independent reviewer process on every study
Zero
Institutional affiliations or conflicts of interest
Responsible AI Integration

AI tools assist literature screening logistics only. All synthesis, interpretation, and analytical judgment remains entirely human-led — ensuring full accountability and defensibility.

Specialist Researcher Network

Domain-specialist clinicians, psychologists, policy experts, and academics contribute to every engagement — interdisciplinary depth without institutional overhead.

01
Protocol Design

Pre-registered, reproducible search protocols ensure full transparency and methodological defensibility from the outset of every engagement.

02
Dual-Reviewer Screening

Two independent reviewers screen and appraise every study — a foundational safeguard against bias that underpins credible evidence synthesis.

03
Critical Appraisal

Quality assessment using internationally validated tools — appraising risk of bias, validity, and real-world applicability for each included study.

04
Synthesis & Delivery

Findings synthesised with specialist academic input, translated into decision-ready outputs that are clear, actionable, equity-aware, and built to withstand scrutiny.

Our Principle

Why rigour is an
ethical obligation

"In health and policy, weak evidence does not just lead to bad decisions — it leads to real harm to real people. Rigour is not only a quality standard. It is a moral responsibility."
Evidence for Impact — Founding Principle

We exist because the stakes in health and psychological evidence are uniquely high. Every synthesis we produce is designed to be used, trusted, and able to hold up when challenged.

Rigour

Reproducible protocols, validated appraisal tools, and full methodological transparency — meeting the highest evidence synthesis standards on every engagement.

Independence

No institutional affiliation. No conflicts of interest. Analysis grounded solely in evidence — defensible before any funder, board, or public scrutiny.

Collaboration

Domain-specialist clinicians, psychologists, policy experts, and academics contribute throughout every review — ensuring interdisciplinary depth and real-world relevance.

Equity

Every synthesis actively surfaces distributional impacts, marginalised populations, and equity gaps — because evidence that ignores equity is incomplete evidence.

Who We Serve

Built for leaders whose
decisions shape lives

🏛️
Government Health & Policy Departments

Supporting ministers, policy units, and reform teams with independently commissioned evidence built to withstand public, parliamentary, and peer scrutiny.

🤲
Health & Social Philanthropies

Helping funders understand where the evidence is strong, contested, or absent — enabling strategic grant-making grounded in the best available science.

🎓
Universities & Research Institutes

Partnering with academic health and psychology teams to produce rigorous synthesis outputs, literature maps, and translational briefs.

🏥
Health Systems & Clinical Leaders

Equipping clinical executives, commissioning bodies, and system leaders with trusted evidence that clarifies trade-offs, surfaces equity implications, and supports defensible resource allocation.

Get In Touch

Ready for an evidence base
you can truly defend?

Whether you have a specific project, need help scoping the right methodology, or want to explore what is possible — reach out. We respond within two business days.

"Book a free 30-minute consultation — no obligation, no pressure."

Tell us about your project and we will identify the right methodology, realistic scope, and timeline. Available via video call or email.

Book Free 30-Min Call →
📅 Free Consultation
Book a 30-min call Free & no obligation
🌐 Website
evidence4impact.org
⏱ Response
Within 2 business days Accepting projects