that classifies personalities into four independent
(orthogonal) types or scales: (1) Extroversion
(E) or Introversion (I), (2) Sensing (S) or intuition
(N), (3) Thinking (T) or Feeling (F), and (4) Judging (J) or Perceiving (P). Developed
by Isabel Myers-Briggs of the US in association
with her mother (who too, like Isabel had no formal training
in psychology), based on the personality types theory
of the Austrian psychologist Carl Jung (1875-1961).