Personality tests such as MBTI, DISC and Kolbe describe general traits and are useful for self-awareness, but they were not built to predict success in a specific job. A behavioral assessment measures how someone prefers to work and compares that to the behaviors a defined role needs, then gets verified in a structured interview.
Millions of people take a personality test every year, and many of those results end up in hiring decisions. That is a use the best-known test's own publisher warns against. Knowing that someone is an "ENFP" or a "high D" tells you something about them. It tells you very little about whether they will succeed in the specific job in front of you. The difference between describing a person and predicting a hire is the difference between these two kinds of tools.
What is the core difference?
A personality test answers the question "what is this person like?" A behavioral assessment used for hiring answers a narrower and more useful question: "how closely does the way this person works match what this role needs?"
The first question has no wrong answers. That is its strength in coaching and team development, and its weakness in selection. A hiring decision needs a target to compare against.
What do MBTI, DISC and Kolbe actually measure?
- MBTI sorts people into 16 types based on preferences such as introversion and extraversion. Its publisher, The Myers-Briggs Company, states it should not be used for hiring decisions.
- DISC describes four behavioral styles (dominance, influence, steadiness, conscientiousness). It is widely used for communication training.
- Kolbe describes instinctive ways of taking action, or "conative" modes.
All three provide information. None of them, used alone, gives you hiring predictability for a specific role, because none of them starts from a profile of that role.
What does the evidence say about trait measures?
In the 2022 Sackett et al. re-analysis of selection research, general conscientiousness measures showed an average validity of .19 for predicting job performance. Structured interviews, which are built around the specific job, showed .42. Broad traits carry some signal, but job-specific methods carry more.
What makes a behavioral assessment different?
A behavioral hiring assessment sits inside a larger structure. In the GoodJob process, the PATH assessment is a self-assessment of work-context behaviors: what motivates and demotivates someone, how they approach problems and collaboration, how they think, their habits, and how they prefer to interact and organize work. The results are compared to a RoleDNA profile for the role, then tested in a structured behavioral interview.
That structure is also what makes it harder to game. Candidates do not know which behaviors the role requires, so there is no obvious "right" answer to aim for, and anything they overstate gets examined in the interview.
Side-by-side comparison
| Personality test | Behavioral hiring assessment | |
|---|---|---|
| Designed for | Self-awareness, team dynamics | Selection for a specific role |
| Compared against | Nothing (descriptive) | A behavioral profile of the role |
| Verified by | Usually not verified | Structured interview evidence |
| Easy to game? | Often, once the desired type is obvious | Harder, the target profile is unknown to candidates |
| Best use | Development after hire | Hiring decisions and onboarding plans |
Should you stop using personality tests?
Not necessarily. Many teams use them well for development and communication. The mistake is using a descriptive tool to make a predictive decision. Keep each tool in the job it was designed for.
Frequently asked questions
Can I use DISC for hiring?
DISC can add context, but it does not compare candidates to the behaviors a specific role needs, so it should not be the basis of a hiring decision on its own.
Is a behavioral assessment a type of personality test?
They overlap in format, since both are usually self-reports. The difference is purpose and structure: a behavioral hiring assessment is scored against a role profile and verified through interviews.
Why is MBTI not recommended for hiring?
MBTI was built to describe preferences, not predict job performance, and its publisher advises against using it for selection.
Related
What is behavioral hiring, and why does it predict performance better?
Behavioral hiring selects people on the work behaviors a role actually needs. Here is how it works, what the evidence says, and how it differs from résumé and gut-feel hiring.
How do you define the behaviors a role actually needs?
A practical method for building a behavioral profile of a role before you hire, including who to involve, what to capture and common mistakes.