There are lots - you probably want to pick a topic with deeply-held preferences, and a fairly large cluster of releated beliefs.
For CS-heavy participants, Vi vs Emacs would have worked 20 years ago - now maybe Java vs Ruby or Android vs iOS. On gaming, perhaps PC vs Console.
More idealogically, vegetarian vs carnivore might work, or direct volunteerism vs earn-to-give, or local vs distant (in space or time) charity targets.
Your CS related ideas have me thinking. I would like to see git vs. svn. In my view, which system to use depends on the project. I prefer svn for most of my projects (those which are small and will not be released), and I think most git users don't understand the various advantages and disadvantages of the different available version control systems. When I mention that I like svn, many git users act with incredulity, and I usually find through discussion with them that they never tried svn.
Hello! I'm running an Ideological Turing Test for my local rationality group, and I'm wondering what ideology to use (and what prompts to use for that ideology). Palladias has previously run a number of tests on Christianity, but ideally I'd find something that was a good 50/50 split for my community, and I don't expect to find many Christians in my local group. The original test was proposed for politics, which seems like a reasonable first-guess, but I also worry that my group has too many liberals and not enough conservatives to make that work well.
What I plan to do is email the participants who have agreed to write entries asking how they stand on a number of issues (politics, religion, etc) and then use the issue that is most divisive within the population. To do that, however, I'll need a number of possible issues. Do any of you have good ideas for ITT domains other than religion or politics, particularly for rationalists?
(Side questions:
I've been leaning towards using the name "Caplan Test" instead of "Ideological Turing Test". I think the current name is too unwieldy and gives the wrong impression. Does the ITT name seem worth keeping?
Also, would anyone on here be interested in submitting entries to my test and/or seeing results?)