A study comparing narrative vs. philosophical arguments about charity finds that the former increase giving (and allocations for international giving) while the latter don’t. Authors conclude this is “preliminary evidence that exposure to at least one type of narrative influences charitable giving, motivation, and opinion, while exposure to one common type of philosophical argument has little if any influence.”
I was also hugely influenced by a logical argument (GiveWell: we do research, you do none, why not use our research and have more impact?) I suspect EA has a disproportionate number of people who are motivated by argument vs. narrative, and probably underestimates the degree to which narratives can convince a broader audience. (That said, I wouldn’t suggest any major strategic changes as a results of this, or any other, single MTurk study.)