What a Behavioral Assessment Can Tell You That an Interview Cannot

Interviews feel like the natural place to evaluate a candidate. You sit across from them, ask questions, and get a sense of who they are. The problem is that interviews are highly susceptible to impression bias. A confident talker can outperform a better-qualified candidate simply because they know how to perform well in a room.

Behavioral assessments work differently. They are not about how well someone presents themselves in the moment. They measure how a person is naturally wired to work, communicate, and make decisions. And that information changes everything about how you hire.

What Behavioral Assessments Actually Measure

A behavioral assessment is a validated tool that reveals patterns in how someone naturally operates. Unlike an interview, which captures a snapshot of how someone presents themselves under pressure, an assessment captures consistent patterns that show up across all situations.

The TriMetrix HD assessment used by BP Dudley and Associates measures four key dimensions:

• Behaviors (DISC): how a person communicates, makes decisions, and interacts with others
• Driving Forces: what motivates them and keeps them engaged over time
• Competencies: where their soft skills are strongest and where development may be needed
• Business Acumen: how they process information and form judgment at work

Together, those four dimensions give you a much richer picture of a candidate than any interview question ever could.

Why Interviews Are Less Reliable Than You Think

Research from the University of Michigan found that traditional unstructured interviews predict job performance with only about 14 percent accuracy. That is barely better than chance. Yet most companies still rely on them as their primary hiring tool.

The reason interviews fall short is not because they are useless. It is because people can practice for them. Candidates know what good answers look like. They prepare. They present the version of themselves that feels most hire-worthy. And because interviewers are human, they respond to things like warmth, confidence, and similarity rather than role-relevant competencies.

What an Assessment Reveals That You Cannot Ask in an Interview

There are things about how a person works that are genuinely hard to surface in a conversation. A behavioral assessment can reveal all of them. For example, it can show:

• Whether someone naturally works at a fast or deliberate pace, and whether the role requires the opposite
• What kind of environment a person thrives in, and whether yours matches that
• What will motivate them to stay engaged long term, and whether your role can deliver that
• Where their blind spots may be when it comes to working with others

You cannot reliably get that information from a well-prepared candidate answering interview questions. It takes something more objective.

Assessments Reduce Bias in the Hiring Process

One of the most important things a behavioral assessment does is level the playing field. When you are evaluating candidates based on data rather than impression, you are less likely to be influenced by factors that have nothing to do with job performance.

According to research from Harvard Business Review, structured hiring processes that include objective assessments significantly reduce the impact of affinity bias, the tendency to favor people who remind you of yourself. For growing businesses trying to build strong and diverse teams, that matters a great deal.

How Assessments and Interviews Work Together

Using a behavioral assessment does not mean skipping the interview. It means using the assessment to make your interviews sharper. When you review a candidate’s results before the conversation, you know exactly what to probe. You can ask targeted questions about the areas where the data raises questions, and you can validate what the assessment shows.

This approach, sometimes called a structured interview guided by assessment data, is one of the most reliable hiring methods available. You are combining objective measurement with human judgment, which is much stronger than either one alone. For a deeper look at evidence-based hiring research, the work done by the Society for Industrial and Organizational Psychology offers an excellent foundation.

What This Looks Like for Your Business

Imagine you are hiring for a role that requires high attention to detail, steady and consistent output, and strong follow-through. A behavioral assessment can tell you whether a candidate is naturally wired for that kind of work, or whether they are more energized by variety and fast-moving priorities.

Neither style is better or worse. But matching the right style to the right role makes an enormous difference in how well someone performs and how long they stay. That is what a behavioral assessment makes possible.

Taking the Guesswork Out of Hiring

The goal of any good hiring process is to make confident decisions based on real information. Behavioral assessments give you that. They reduce the influence of gut instinct, minimize bias, and give you a data point that stays consistent across every candidate you evaluate.

At BP Dudley and Associates, we use the TriMetrix HD assessment as part of a complete hiring support process. We help you understand what the data means, how to use it in your interviews, and how to make decisions you can feel good about.

Curious what a behavioral assessment could reveal about your next candidate? Book a Leadership Hour with BP Dudley and Associates and let’s talk through your hiring goals together.

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Frequently Asked Questions

Are behavioral assessments legally compliant for hiring?

Yes, when used correctly. Validated assessments like TriMetrix HD are designed to be job-relevant and legally defensible. The key is using them consistently and as one data point among several rather than the sole basis for a hiring decision.

How long does a behavioral assessment take to complete?

Most candidates complete a TriMetrix HD assessment in about 30 to 45 minutes. It is a straightforward process that does not require any special preparation. 

When in the hiring process should we use an assessment?

Assessments work best after you have narrowed your candidate pool to a small group of finalists. Using the data at that stage helps you compare candidates more objectively before making a final decision. 

Can assessments be used beyond hiring?

Absolutely. Behavioral assessment data is also valuable for onboarding, team building, leadership development, and coaching. Many organizations use them throughout the employee lifecycle.