The Lenore Thomson Exegesis Wiki
A function-attitude is a Jungian function used in an Extraverted or Introverted attitude.
In Lenore's system, there are four functions:
Sensation
Intuition
Thinking
Feeling
...and eight function-attitudes:
Extraverted Sensation
Extraverted Intuition
Extraverted Thinking
Extraverted Feeling
Introverted Sensation
Introverted Intuition
Introverted Thinking
Introverted Feeling
comparing functions
Lenore often refers to function-attitudes just as "functions", which goes back to Jung.
On this wiki, we lean toward the more intuitively clear word "attitudes".
Exactly what a function-attitude is is the main part of the Definition Problem. See also Genus Problem.
Q. Why did Jung choose the term "function"?
A. Perhaps to get psychology to sound like physics or mathematics.
...any other answers?
A. Random House definition of function: #1 the kind of action or activity proper to any person or thing #2 the purpose for which something is designed or exists. As an INFJ, it makes perfect sense to me. Your function is what serves your purpose, it is what's proper to yourself. If you want more of where this came from, check this out
A. Because each function has a different purpose for being there, and possibly because it sounded right to Jung's Ti. It could also be said as: "Each function has a different function," but that would be repetitive and impossible to understand. Do you use Si for the same thing for which you use Fe? No. They're far from the same. See Tertiary Temptation. (Rebekah Yoder)