There is still no consensus on this forum when it comes to the question: What are the differences in the interpretation of the Jungian dichotomies?
Some people believe that the Jungian dichotomies are "defined" differently, that MBTI uses different "definitions". The truth is, it is almost impossible to define those dichotomies properly. They can only be interpreted correctly by looking at different people.
Okay, so where are the mistakes in the way MBTI interprets them? This question might be answered by using Reinin dichotomies:
MBTI Judging = judging*strategic*process*serious in socionics
MBTI Perceiving = perceiving*tactical*result*merry in socionics
On Myers Briggs Personality Test MBTI Personality Types they say that Judging types "complete meaningful segments before moving on" wheras Perceiving types "Like to multitask". In socionics, this difference has not much to do with judging/perceiving - it is called process/result instead. There are types that are judging*result (INTj, ESFj, ENTj, ISFj). They plan ahead (judging) but multitask a lot (result). And there are types that are perceiving*process (ENTp, ISFp, ESFp, INTp). They don't plan ahead that much but they don't multitask, either.
On Judging-Perceiving are Preferences for Ordering Your World! they say that Judging types "like to set and reach goals", "goal oriented". In socionics, being goal-oriented has not that much to do with judging/perceiving - we rather call it tactical/strategic. There are judging types that are tactical (= not very goal oriented), they rather focus on methods instead of thinking about goals (ESFj, ISTj, ISFj, ESTj). There are also perceiving*strategic types (ISFp, ESTp, ESFp, ISTp). Especially in the case of ESTp and ESFp it is simply wrong to assume that they are not goal oriented.
The same page says that Judging types are "more formal and conventional,
more serious" whereas Perceiving types are "more casual and unconventional
more playful". In socionics, this difference has not much to do with judging/perceiving - it is called merry/serious. judging*merry types are NOT "formal, conventional, serious" and perceiving*serious types are not "casual, unconventional, playful".