[5] In August 1928, she participated in a mystery novel writing contest jointly offered by McClure's magazine and Frederick A. Stokes Company.

Her novel Murder Yet to Come won the contest and was published periodically in the monthly magazine The Smart Set (which had absorbed McClure's in March 1929) between August 1929 and January 1930.

[6] As WWII broke out, Briggs Myers read an article titled, “Fitting the Worker to the Job,” and she recognized a need for a “people sorting instrument,” especially as US involvement in the war in Europe seemed more likely.

The test was to assess personality type and was fully developed after 20 years of research by Briggs Myers with her mother.

[15][3] Isabel Briggs Myers typed herself as an INFP (Mediator) personality and was an explorer of the concept of introversion and extroversion.

In 1945, the dean of the George Washington School of Medicine allowed Briggs Myers and her mother to apply the MBTI to first-year undergraduates.

[16] As of 2022[update], according to the Myers & Briggs Foundation, "research on the MBTI instrument has continued into the present, with dozens of articles published each year.