Developed in the 1960s, this assessment is still used today to measure personality types. Out of all the types, the “INFJ” personality is the rarest one. “INFJ” is one of the most special ...

Today, those four letters are more likely to be INFJ, ESTP, or ENFP or shorthand for a personality type based on the Myers-Briggs Type Indicator (MBTI). Once confined to corporate HR assessments and ...