Martial arts can be a good training to ensure your personal security, if you assume the worst about your tools and environment. If you expect to find yourself unarmed in a dark alley, or fighting hand to hand in a war, it makes sense. But most people do a lot better at ensuring their personal security by coordinating to live in peaceful societies and neighborhoods; they pay someone else to learn martial arts. Similarly, while "survivalists" plan and train to stay warm, dry, and fed given worst case assumptions about the world around them, most people achieve these goals by participating in a modern economy.
The martial arts metaphor for rationality training seems popular at this website, and most discussions here about how to believe the truth seem to assume an environmental worst case: how to figure out everything for yourself given fixed info and assuming the worst about other folks. In this context, a good rationality test is a publicly-visible personal test, applied to your personal beliefs when you are isolated from others' assistance and info.
I'm much more interested in how we can can join together to believe truth, and it actually seems easier to design institutions which achieve this end than to design institutions to test individual isolated general tendencies to discern truth. For example, with subsidized prediction markets, we can each specialize on the topics where we contribute best, relying on market consensus on all other topics. We don't each need to train to identify and fix each possible kind of bias; each bias can instead have specialists who look for where that bias appears and then correct it.
Perhaps martial-art-style rationality makes sense for isolated survivalist Einsteins forced by humanity's vast stunning cluelessness to single-handedly block the coming robot rampage. But for those of us who respect the opinions of enough others to want to work with them to find truth, it makes more sense to design and field institutions which give each person better incentives to update a common consensus.
I'm not sure I can let you make that distinction without some more justification.
Most people think they're truth-seekers and honestly claim to be truth-seekers. But the very existence of biases shows that thinking you're a truth-seeker doesn't make it so. Ask a hundred doctors, and they'll all (without consciously lying!) say they're looking for the truth about what really will help or hurt their patients. But give them your spiel about the flaws in the health system, and in the course of what they consider seeking the truth, they'll dismiss your objections in a way you consider unfair. Build an institution that confirms your results, and they'll dismiss the institution as biased or flawed or "silly". These doctors are not liars or enemies of truth or anything. They're normal people whose search for the truth is being hijacked in ways they can't control.
The solution: turn them into rationalists. They don't have to be black belt rationalists who can derive Bayes' Theorem in their sleep, but they have to be rationalist enough that their natural good intentions towards truth-seeking correspond to actual truth-seeking and allow you to build your institutions without interference.
I had in mind that you might convince someone abstractly to support eg prediction markets because they promote truth, and then they would accept the results of such markets even if it disagreed with their intuitions. They don't have to know how to bet well in such markets to accept that they are a better truth-seeking institution. But yes, being a truth-seeker can be very different from believing that you are one.
Btw, I only just discovered the "inbox" that lets me find responses to my comments.