Gifts Differing

Isabel Briggs Myers · 1980

The founding book of the Myers-Briggs Type Indicator (MBTI) with its 16 types.

Four axes (energy, perception, decision, structure) generate 16 types. It helps contrast how 'type' systems work compared with 'trait' systems.

Widely used but with disputed scientific validity. It's a clear example of a typology: useful as a conversational map, not as an objective measure.