Every case study in the Stack is real.
Published. Field-tested. Outcome-focused.
But not all evidence is equal. So we tag each one with a simple rating to help you judge what to trust, test, or adapt.
What the tags mean
Gold
Strongest proof. With deep, robust behavioural details to back it up. Usually based on a large-scale, multi-phase RCT or meta-study with a large sample. Transparent methods and results mean we’ve assessed the evidence in detail.
Silver
Clear behaviour change observed and tested on real people. We couldn’t get hold of the in-depth analysis or research methods; otherwise, it would likely be a Gold.
Bronze
Published but surface-level. You can see what worked and roughly how, but not the mechanics or depth (e.g., consultancy case study without a methods appendix). With more details, it would likely rank Silver or higher.
How we assess each one
We look at four key things to decide the rating:
- Clear behaviour goal
Was the project designed to shift a specific behaviour, not just awareness or attitude? - Evaluation design
Was there a strong method to measure change? (e.g. RCT > matched group > pre/post > anecdote) - Sample size
Was it tested on enough people to trust the result? - Transparency
Are the methods and outcomes clear and public?
We score each case across these areas.
If one part is weak or unclear, we lower the overall rating.
How to work with the tags
This helps you choose what to try, and when to trust it.
★ Gold
Use when:
- You want high certainty
- You’re designing for safety, compliance, or scale
- You need to convince those stickier stakeholders
▲ Silver
Use when:
- You’re adapting a tested idea
- You want something reliable, fast
- You’re running a mid-stakes pilot
◼︎ Bronze
Use when:
- You need inspiration for early-stage work
- You’re running a quick test or sprint
- You’ve seen similar issues and want a starting point
Tip: Bronze doesn’t mean bad.
It means “good idea, less detail.”
Start small, test fast, and build on it.
All our case studies are:
- Based on real work
- Published by credible sources
- Focused on behaviour in a way that satisfies our behavioural science expertise.
We add the rating so you can make smart decisions.
Use them to judge the strength and act with confidence.