Myers-Briggs | Can’t Sleep? Learn About Personality Types

May 6, 2026

AI Summary

5 min read

In 1917, Catherine Cook Briggs met her future son-in-law and noticed something odd. His personality seemed fundamentally different from the rest of her family. This observation launched a decades-long project: first reading biographies to develop her own four-temperament system, then discovering that Swiss psychiatrist Carl Jung's 1921 book Psychological Types had already mapped the territory far more completely. Briggs typed herself as an INFP. She and her daughter, Isabel Briggs Myers, spent the next several decades turning Jung's complex theory into a simple questionnaire—the Myers-Briggs Type Indicator—that would eventually be taken by an estimated 50 million people. The only problem: psychology regards it as essentially useless.

The Test and Its Origins

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What you'll learn

1 Myers-Briggs | Can’t Sleep? Learn About Personality Types
2 (02:30) **What the MBTI Claims to Be** - The Myers-Briggs Type Indicator is introduced as a self-report questionnaire that sorts people into 16 personality types using four letter codes like INTJ or ESFP
3 (03:40) **Briggs' Fascination with Jung** - Briggs found Jung's concept of introversion particularly compelling and typed herself as an INFP, but thought Jung's book was too complex for general use
4 (04:15) **Scientific Criticism of the MBTI** - The test exhibits significant deficiencies including poor validity, poor reliability, and measuring categories that are not truly independent
5 (05:17) **Psychology's Verdict: Useless** - The MBTI lacks predictive power for job performance, career satisfaction, or any meaningful outcome
6 (06:21) **The Origin Story: Briggs' Early Typology** - Briggs began personality research in 1917 after observing differences between her future son-in-law and other family members
7 (08:00) **Briggs' Publications and the War Effort** - Briggs published two articles describing Jung's theory in *The New Republic* in 1926 and 1928

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Show Notes

Can’t sleep? Great, let’s sort humanity into tidy little personality boxes and see how that goes. In this episode, we read about the Myers-Briggs Type Indicator, including its origins, personality preferences, type categories, popularity, and the criticism surrounding whether it actually measures what people think it measures.

This episode is calm, steady, and intentionally low-energy, with no whispering and no sudden nonsense. Just an interesting enough topic to keep your brain occupied without encouraging it to start a group chat at 2 a.m.

Happy sleeping!

Read with permission from Myers-Briggs Type Indicator, Wikipedia (https://en.wikipedia.org/wiki/Myers%E2%80%93Briggs_Type_Indicator), licensed under CC BY-SA 4.0.

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