Thomas Aston – Medium

Thomas Aston

Ignorance, uncertainty, and the importance of judgement

I’ve read several books by the physicist Carlo Rovelli recently, and they’ve given me the opportunity to reflect on my ignorance. I have no…

Jan 9

Ignorance, uncertainty, and the importance of judgement

Jan 9

How to think differently about the value of interventions

With Florencia Guerzovich

Nov 17, 2024

How to think differently about the value of interventions

Nov 17, 2024

Thinking beyond the best practice myth of “best buys”

With Florencia Guerzovich

Nov 13, 2024

Thinking beyond the best practice myth of “best buys”

Nov 13, 2024

Repositioning evaluation theory trees

I was recently asked by Rosa María Flores Rodríguez for my thoughts on evaluation theory trees. For several years, Flores Rodríguez has…

Aug 20, 2024

Repositioning evaluation theory trees

Aug 20, 2024

Pivot or entropy? The end of the gold standard

In my previous blog, I documented some of the most common critiques of the supposed “gold standard,” Randomised Control Trials (RCTs)…

May 25, 2024

Pivot or entropy? The end of the gold standard

May 25, 2024

The fall of Icarus

We often have conversations about research and evaluation methods which depart from the notion that some methods are, a priori, better than…

May 17, 2024

The fall of Icarus

May 17, 2024

Making sense of all the sense making

I don’t know if you’ve noticed, but there seems to have been a boom in sensemaking.

Mar 17, 2024

Making sense of all the sense making

Mar 17, 2024

Higher, broader, and deeper level results

I’ve written in the past on the difference between outputs and outcomes, but I’ve rarely reflected on the issues of breadth or depth of…

Feb 19, 2024

Higher, broader, and deeper level results

Feb 19, 2024

Sins of commission: The five most common mistakes when hiring an evaluator… and how to avoid them

Written with Matthew Carr and Johanna Morariu

Jan 7, 2024

Sins of commission: The five most common mistakes when hiring an evaluator… and how to avoid them

Jan 7, 2024

Embracing fuzziness in assessing complex change processes

Success, failure, or both?

Nov 4, 2023

Embracing fuzziness in assessing complex change processes

Nov 4, 2023

Thomas Aston

Thomas Aston

I'm an independent consultant specialising in theory-based and participatory evaluation methods.

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