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Originally Posted by
coeruleum
Duality and ITR are much less empirical than other aspects of socionics. The ordering of socionics functions are much more theoretically rigorous and therefore falsifiable than MBTI or other similar adaptations of Jung's typology, but besides Olga Tangemann, no one has gotten close to actually empirically testing them. Questionnaires are valid but also have limited validity in applications. ITR would be best tracked through case studies and to a lesser extent controlled experiments, after the participants are typed individually, though double blind experiments with personalities seems extremely difficult to say the least.