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Michael_S comments on An Effective Altruist Message Test - Effective Altruism Forum

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Comment author: Michael_S 01 April 2017 10:07:30PM *  -1 points [-]

Yeah, the survey was a lot longer. Typically general public surveys will cost over 10 dollars a complete, so getting 1200 cases for a survey like this can cost thousands of dollars.

I agree that model specification can be tricky, which is a reason I felt it well worth it to use the proprietary software I had access to that has been thoroughly vetted and code reviewed and is used frequently to run similar analyses rather than trying to construct my own.

I did not make sure people read the paragraph. I discussed the issue a bit in my discussion section, but one way a web survey might understate the effect is if people would pay closer attention and respond better to a friend delivering the message. OTOH, surveys do have some potentual vulnerability to the hawthorne effect, though that didn't seem to express itself in the donations question.