MBTI and Jungian Functional Notation
The 16 MBTI types can actually be translated into functional orientation and preference order. If you noticed (previous page) the MBTI has a "trait" called Judging or Perceiving and not coincidentally each of the four functions can be grouped as either a "judging" or a "perceiving" function. What the J and P traits as identified by the MBTI are actually doing is determining which of the four functions the individual has a preference for Extroverting or displaying to the outside world as opposed to which function they Introvert or use internally. So a person who scores with a preference for J on the MBTI has a preference for extroverting their judging function, either T or F. A person who scores P on the MBTI has a preference for extroverting their perceiving function, either N or S. By combining this with the individualís MBTI score as Extroverted or Introverted, you can determine which function is an individualís dominant or preferred function.
Letís use ESTJ and ISTJ as examples. Notice they are both xSTJ. That means they both prefer Sensing, Thinking and extroverting their Judging function (T). The ESTJ is extroverted which means that their extroverted function is their preferred function (Te). The ISTJ however is introverted so even though they have a preference for extroverting the same judging function it cannot be their dominant function. Their dominant/first function is therefore their perceiving function in the introverted attitude (Si). The same sequence is performed for those who score a preference for P instead of J.
Once you know a personalities dominant function it is easy to identify the preference and attitude for the remaining three functions. While everybody can learn to use all 8 functions/attitudes most people tend to exhibit the first four and too often (particularly in the US) only the first two are developed adequately. So now that we know that Te is the ESTJís dominant function we can say that their second function is Si. Consequently the other to functions come next and would be Ne and Fi. In order that would be, Te Si Ne Fi. The ISTJís dominant function is Si so their functions in order would be, Si Te Fi Ne. Further along in this document is the physiological explanation for this order of preference.
So now we know two ways to notate personality/functional expression. Here Iíll provide a table comparable to the one just given but in order of the first four functional preferences. You can see the MBTI notation is simpler to refer to if perhaps not as clear as to what is actually being expressed.