Holland's RIASEC theory

If the NCE has a single favorite career theory, it's this one. John Holland argued that both people and work environments can be sorted into six types, and career satisfaction comes from matching them. The six types spell the mnemonic RIASEC, and you should be able to fire off all six with a one-word descriptor each.

R — Realistic (Doers): hands-on, mechanical, outdoors — think mechanic, engineer. I — Investigative (Thinkers): analytical, scientific, curious — scientist, researcher. A — Artistic (Creators): expressive, original, unstructured — writer, designer. S — Social (Helpers): nurturing, teaching, serving — counselor, teacher, nurse. E — Enterprising (Persuaders): leading, selling, persuading — manager, salesperson, attorney. C — Conventional (Organizers): orderly, data-driven, detail-oriented — accountant, clerk.

Each person and job gets a Holland code — usually the top three types (e.g., SAE). Around that typology sit four constructs the exam loves:

Congruence = the fit between person and environment (a Social person in a Social job = high congruence, the strongest predictor of satisfaction). Consistency = how closely a person's top types sit on the hexagon; adjacent types (R and I) are consistent, opposite types (R and S) are inconsistent. Differentiation = how sharply one type dominates; a peaked profile is well-differentiated, a flat "jack-of-all-trades" profile is undifferentiated. Identity = clarity and stability of one's goals and interests.

The glue is the hexagon: the six types arranged R-I-A-S-E-C around a six-sided figure. Adjacent types are most similar, alternate types moderately similar, and opposite types (directly across) most dissimilar. That geometry is how you compute consistency and how you gauge the pain of any compromise.

Clinical Pearl: Don't blur the four C-words. Congruence = person-to-environment fit (the big satisfaction predictor); consistency = relatedness of a person's own top types on the hexagon; differentiation = how distinct/peaked the profile is. If a stem describes matching a person to a job, it's congruence — every time.