Having "do things right" type, I did a long and wide study of own type to become sure in it and in Socionics theory. And then I typed alot and checked by IR own type as a secondary effect, so the assurance is very high (~100%). Besides I had an independent match of opinions of some "gurus" about own type from the start.
My IR test is made on my types understading. As seems it gives adequate results this proves objectively that I type not so badly to mistake in own type for many years.
"Join Date Nov 2005"
try
IR test
this gives +10 to Socionics Karma and +20 to Assurance in self-typing
do this 2 times: on men, then on women
it's still experimental