How do people hear about and get involved in effective altruism (EA)? We have good data about this for active community members who fill out the EA survey, but it’s harder to get data on people earlier in their exploration or people in demographic groups that have less outreach and services specifically for them.

Here, I share some data from 63 smart, curious, and altruistic UK teenagers who participated in programmes run by myself (aka Leaf) who reported to have heard of effective altruism before.

The key results and takeaways:

• The most common places that people first or primarily heard about EA seem to be Leaf itself, Non-Trivial, and school — none of these categories show up as prominently on the EA survey.
• Many people heard about EA from multiple sources. Using a more permissive counting system, the most common sources people mentioned at least briefly were Leaf and hearing from a friend.
• (More tentative) 80,000 Hours, LessWrong, and podcasts seem to have been less important for this group than you might expect from having seen the EA survey.

Methodology & context

This information comes from 15-18 year olds in the UK who were offered a place on one of two programmes by Leaf this year (2023):

• Changemakers Fellowship: One-week summer residential programme with follow-up mentorship to meet other changemakers tackling pressing social issues, and fast-track your progress towards making a major difference. Students of any and all subjects.
• History to shape history (for the better): 5-week online fellowship exploring how to use the lessons of history to make a positive impact and steer humanity onto a better path. History students.

I advertised both of these programmes as for “smart, curious, and ambitiously altruistic” teenagers — effective altruism was not discussed on the programme landing pages but was highlighted for transparency on Leaf’s “About” page and FAQ.

After being offered a place on the programme, participants were sent a consent form, which included various other questions. The data in this post all comes from people who first answered “Yes” (out of “Yes”, “No”, or “Maybe”) to the question “Before hearing about this programme, had you heard of the term ‘effective altruism’?”.

 I then informally analysed free-text, qualitative responses to the question “If you had heard of effective altruism and/or longtermism before hearing about this programme, please describe in your own words how you heard about them or explored them.”

Applicants to the Changemakers Fellowship who hadn’t participated in Leaf programmes previously were 28% white and 40% male. History to shape history applicants were 50% white, 27% male. All were aged 15-18 and live in the United Kingdom.

This appendix contains:

• A table separating out results for the participants of the two programmes and providing one example of an answer from each type of category
• The full set of qualitative responses and my categorisations of them
• A table with info about how people heard about Leaf itself

Results

I categorised responses twice:

• “Primary” — I selected only one option from each response, prioritising whichever seemed to come chronologically first for them or (if this was unclear) seemed more important to their journey.
• “Permissive” — counting as many different things as they mentioned, however briefly, and using a more permissive standard for what counted as relevant as opposed to “NA”.

*Likely a misunderstanding, hadn't actually heard about it until hearing about this programme, or didn't answer the question.
 

My thoughts

The main point of this post was just to share the raw data. But here are some brief reflections:

• I was surprised that EA was filtering through to so many school teachers or classes. This doesn’t show up at all on the EA Survey, so is presumably a reflection of increased salience of effective altruism generally.
• Although the number of accepted applicants who reported having heard of effective altruism was more than double what I’d expect in the general population, a decent number of these people heard about it either primarily or additionally because of programmes aiming at their demographic specifically — Leaf and Non-Trivial.
• It’s interesting how many of these people decided to dig into EA further themselves after whatever source first introduced them to it. On the other hand, there were quite a few people who encountered EA through multiple different mechanisms. Overall, my view doesn’t change much on how optimistic I am about the value of light touch, low-cost outreach for scooping up low-hanging fruit.
• Relative to the EA Survey, 80,000 Hours, personal contact, LessWrong, and podcasts (plus, of course, uni groups!) seem to have been less important as the first point of contact, although I used different categories and definitions which makes direct comparison messy, especially for “personal contact”.
• Pushing in the opposite direction, compared to the EA Survey, contact from school, Leaf, and Non-Trivial all seem to have been more important than I would have expected. Likewise for Peter Singer and YouTube / Ted talks too, though to a lesser extent. [Edit: The importance of school seems roughly in line with some unpublished findings from Rethink Priorities, separate to the EA survey.]

I haven’t gone into detail about the various caveats and limitations of this ‘data’; I think they’re probably pretty self-explanatory. I wouldn’t change your beliefs too strongly about ~anything from this info, though I firmly believe that weak evidence is often still useful evidence!

Your thoughts?

I’d love to hear what surprises you, if anything, in the comments.

I wrote this post as a bit of a test. There are a bunch of other mini posts like this that I could write up based on data from Leaf’s programmes. Writing these up probably won’t help me or Leaf in any very tangible way, and I don’t have a very clear reason or theory of change for actually writing them up; these things lead me to think it’s not worth spending time on it. So if you would find any of these topics useful to have a writeup on, please let me know (and why), otherwise it probably won’t happen:

• Why I’m deprioritising residential programmes
• Cause prioritisation changes: pre-post comparisons from 3 Leaf programmes
• Objections raised to videos about EA and longtermism by teenagers encountering them often for the first time (analysis of application form questions, a bit like this post)
• Data and analysis of the marketing successes and failures for Leaf
• Rough and ready cost-effectiveness modelling for EA talent search programmes, using Leaf as an example (BOTECs / Fermi estimates, not rigorous research!)
• Miscellaneous lessons and hot takes from ~4 years of paid nonprofit entrepreneurship (~10 years unpaid with a looser definition)
• Miscellaneous lessons and hot takes about EA-adjacent programmes for school kids
• Some other topic you expect I might have insight or experience into?

For reference, this post took me ~3.5 hours to write, and most of the above would take (much) longer.