Yamil Ricardo Velez
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yamilrvelez.bsky.social
Yamil Ricardo Velez
@yamilrvelez.bsky.social
political scientist at Columbia | MIA ✈️ NYC | tailored surveys and experiments
It's likely not a problem *yet*
November 24, 2025 at 4:41 PM
Thanks for flagging! I know Brave has several privacy layers. Will look into it.
November 24, 2025 at 3:44 PM
Thanks! Have to channel my existential panic into something!
November 24, 2025 at 3:10 PM
Surveys are going to need new ways to establish human presence as AI gets faster and harder to detect. Pulse is one step in that direction.

Special thanks to @seanwestwood1.bsky.social who flagged several spoofing paths. This is exactly the kind of scrutiny we’ll need as we adapt to this new era.
November 24, 2025 at 2:57 PM
This doesn’t solve the “verify-then-handoff” problem. But it does filter out the most aggressive headless-browser attacks and gives us a first layer of defense in an era where attention checks and gotcha questions fail.

Demo and QSF download here: columbiauniversity.qualtrics.com/jfe/form/SV_...
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columbiauniversity.qualtrics.com
November 24, 2025 at 2:57 PM
I'm currently working on Pulse, a “proof-of-life” approach compatible with Qualtrics that uses a simple finger-on-lens verification task to confirm human presence. This approach avoids privacy concerns tied to capturing faces or living environments, and it works on laptops and smartphones.
November 24, 2025 at 2:57 PM
I used to believe that survey aesthetics have minimal effects on completion rates and attentiveness… until I saw that slime-green color scheme
October 6, 2025 at 9:20 PM
Agreed. Adding links has been my workaround, but that might assume an unrealistically high level of reviewer motivation.
July 14, 2025 at 4:54 PM
I played around with Gemma 3 27B for a few hours the other day and was impressed. There are lower quants that should run on your machine. Not sure how it performs with long context.
April 18, 2025 at 6:00 PM
For those interested in deploying their own CSAS, you can visit tailoredexperiments.com

The code is open source.
Yamil Ricardo Velez - Tailored Experiments using Generative AI
tailoredexperiments.com
February 12, 2025 at 5:41 PM
The paper is open access: www.cambridge.org/core/journal...
Crowdsourced Adaptive Surveys | Political Analysis | Cambridge Core
Crowdsourced Adaptive Surveys
www.cambridge.org
February 12, 2025 at 5:41 PM
By bridging the gap between researchers and participants, CSAS could ultimately lead to a better understanding of public opinion.
February 12, 2025 at 5:41 PM