16PersonalityLab

Editorial Team

The 16PersonalityLab editorial team explains personality preferences, four-letter type codes and report interpretation. Our articles connect these concepts with everyday situations and distinguish descriptions of the type framework from information about our own assessment.

Personality Basics

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What Do the Four Letters in the 16 Personality Types Mean? From Codes to Everyday Preferences

What does each letter in INTJ, ENFP, and ISFJ mean? Explore the four preference pairs—E/I, S/N, T/F, and J/P—through a shared everyday scenario, and learn to distinguish personality tendencies from abilities and specific behaviors.

16PersonalityLab

October 29, 2026