However, neither Myers nor Briggs was formally educated in the discipline of psychology, and both were self-taught in the field of psychometric testing. Hay, who was then personnel manager for a large Philadelphia bank and who went on to start one of the first successful personnel consulting firms in the United States.From Hay, Myers learned rudimentary test construction, scoring, validation, and statistical methods.
Briggs's daughter, Isabel Briggs Myers, added to her mother's typological research, which she would progressively take over entirely.
Myers graduated first in her class from Swarthmore College in 1919 and wrote a mystery novel, Murder Yet to Come, in 1929 using typological ideas (which won the National Detective Murder Mystery Contest that year).
Jung theorized that the dominant function acts alone in its preferred world: exterior for extraverts and interior for introverts.
The remaining three functions, he suggested, operate together in the opposite orientation.
Katharine Cook Briggs began her research into personality in 1917.
Upon meeting her future son-in-law, she observed marked differences between his personality and that of other family members.
None of these types is "better" or "worse"; however, Briggs and Myers theorized that people innately "prefer" one overall combination of type differences.
In the same way that writing with the left hand is difficult for a right-hander, so people tend to find using their opposite psychological preferences more difficult, though they can become more proficient (and therefore behaviorally flexible) with practice and development.
in the belief that a knowledge of personality preferences would help women who were entering the industrial workforce for the first time to identify the sort of war-time jobs that would be "most comfortable and effective" for them.