Holland's Six Interest Types (RIASEC): Your Work Preferences on a Hexagon

What kind of work makes you lose track of time? The most widely used framework for answering that question comes from psychologist John Holland. Nadapge’s career test measures his six interest types using items from the O*NET Interest Profiler, a free instrument published through the U.S. Department of Labor’s occupational information network.

The six interest types

Holland’s central idea was that both people and work environments can be described with the same six labels (Holland, 1997). Their initials spell RIASEC.

Type	Drawn to	Example work
R Realistic	Hands-on work with tools, machines, plants, or animals	Mechanic, builder, farmer, chef
I Investigative	Observing, analyzing, figuring out how things work	Researcher, data analyst, lab scientist
A Artistic	Open-ended expression and creating	Designer, writer, musician, filmmaker
S Social	Teaching, helping, caring for others	Teacher, counselor, nurse, social worker
E Enterprising	Persuading, leading, starting things	Sales, management, entrepreneur
C Conventional	Organizing information accurately with clear procedures	Accountant, administrator, quality control

Results are often summarized as a three-letter code, such as SAE or IRC. The code is handy, but the shape of all six scores tells you more than the letters alone.

The hexagon: near and far types

Holland arranged the types around a hexagon in R-I-A-S-E-C order. Neighbors are similar; opposites are most different. Investigative and Enterprising sit opposite each other, which makes sense: the joy of digging into how things work is quite different from the joy of moving people to act.

A structural meta-analysis found that interest data generally follow this circular order, though the shape is more of a rough circle than a perfect hexagon, and the fit varies across groups and cultures (Tracey & Rounds, 1993). Later reviews reach a similar verdict: the theory’s structure holds up well, while some of its predictions are weaker than Holland hoped (Nauta, 2010).

Three ideas for reading your profile

Congruence: do you and the job match?

Congruence is how closely your interest code matches the code of a work environment. Holland predicted that people seek out congruent environments and are more comfortable and persistent in them. How much congruence actually boosts performance and satisfaction is a separate, more nuanced question, covered in our guide on interests and performance.

Consistency: are your top types neighbors?

If your top two or three types sit next to each other on the hexagon (say, Social and Artistic), your profile is consistent. If opposite types are both high (say, Artistic and Conventional), consistency is low. That is not a flaw. It means you enjoy two different kinds of activity, and roles that bridge them, like managing a design system, can turn that mix into an advantage.

Differentiation: is there a clear peak?

When the gap between your highest and lowest scores is large, your profile is well differentiated: your preferences are clear. When all six are similar, a few explanations are possible:

• You have broad interests across many areas.
• You have not tried many kinds of work yet, so it is hard to judge.
• You are worn out and nothing sounds appealing right now (especially if all scores are low).

Do interests change?

Interests are fairly stable. A review of longitudinal studies found that the rank-order stability of interests increases through adolescence and is quite high by early adulthood (Low et al., 2005). Still, new experiences, mentors, and colleagues can grow new interests. If you have not tried much yet, a low score may mean “I don’t know this” more than “I dislike this.” Students and early-career adults may find it useful to retake the test every year or two.

Using O*NET

O*NET describes more than 900 occupations, including tasks, required skills, and interest codes. The short Interest Profiler that Nadapge draws on was released for free use, and its developers published reliability and validity evidence (Rounds et al., 2010). Searching occupations by your code can surface jobs you have never considered.

Two cautions. Group averages differ by sex on some interests (Su et al., 2009), but averages say nothing about which work suits any individual. And interest is not ability: a high score does not mean you will be good at something, and a low score does not mean you cannot do it.

How to use this

1. Write down your top three types and your lowest type.
2. List three activities from the past year that made you lose track of time, and note which type each resembles.
3. Search occupations matching your top code, pick two you have never heard of, and look up what a typical day involves.
4. Talk to someone in that work, or try a small taste of it: a course, volunteering, or a side project.

See your RIASEC scores and hexagon in the career interest test, then compare them with your personality in your report.