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.”
Interesting. As someone who was massively influenced by Famine, Affluence and Morality my hunch is that philosophical arguments are very effective for a small group of people. I don't think this should obviously cause EA to switch to, and only to, narrative arguments: maybe those convinced by philosophical reasons end up being the more effective altruists.
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.)