Do work samples predict performance better than interviews?

Yes. Decades of selection research show methods that resemble the job predict better — the unstructured interview is one of the weaker common predictors, while structure and work samples reliably improve accuracy.

How do you use a work sample for client-facing roles?

The work is a live conversation, so recreate it realistically — put every candidate into the same close-to-real situation, give them time to handle it, and capture how they performed for direct, comparable evidence.

Work Samples vs. Interviews — What Actually Predicts Job Performance

Q: What's the difference between a work sample and an interview?

An interview asks people about the work; a work sample watches people do it. One measures how well someone talks about a skill, the other measures the skill — and that distinction matters enormously for prediction.

There's a simple question at the heart of every hiring decision: will this person be good at the job? Everything you do in a hiring process — the CV screen, the interview, the reference check — is an attempt to predict that one thing. So it's worth asking which of those methods actually works, and the answer is clearer than most hiring processes act like it is.

Two ways to find out if someone can do the job

Broadly, you can predict job performance in two ways.

You can ask people about the work — which is what an interview does. You sit down, you ask how they'd handle situations, you listen to their examples, and you form a judgment. It's a conversation about the job.

Or you can watch people do the work — which is what a work sample does. You give the candidate a representative slice of the actual role and see how they perform. It's a demonstration of the job.

These sound similar. They are not. One measures how well someone talks about a skill; the other measures the skill. And when researchers have compared how well different methods predict actual on-the-job performance, that distinction turns out to matter enormously.

What the evidence says

Decades of research into personnel selection point in a consistent direction: methods that resemble the job predict performance better than methods that don't.

The classic unstructured interview — the free-flowing chat where each candidate gets different questions and you score on overall impression — is one of the weaker predictors in common use. It feels insightful, which is exactly why it's so durable, but the feeling of insight outruns the accuracy.

Two things reliably improve prediction. Structure is the first: asking every candidate the same questions and scoring against defined criteria sharply outperforms the loose conversation. Work samples are the second: having the candidate actually perform a representative task is among the strongest predictors available, because you're no longer inferring ability from a story — you're observing it directly. The more an assessment looks like the job, the more it tells you about how someone will do the job. That's the whole principle in one sentence.

Why interviews survive despite the evidence

If work samples predict better, why do interviews still dominate hiring?

Habit and comfort, mostly. Interviews are familiar and easy to run. They also feel like they work — we're confident we can read people, and that confidence is hard to shake even when outcomes don't support it. And work samples have a reputation for being effortful to design, which makes the easy conversation the path of least resistance.

There's also a practical obstacle for certain roles. For some jobs, a work sample is straightforward — give a developer a coding task, give a writer an editing brief. But for client-facing roles, the "work" is a live human conversation, and you can't easily stage a real angry customer or a real tense negotiation inside a hiring process. So even teams that believe in work samples often can't run one for the exact roles where it would help most — and they fall back on asking the candidate to describe how they'd handle it. Which is just an interview again.

Bringing the work sample to client-facing roles

This is the gap worth closing, because it's where the biggest hiring mistakes happen and where evidence is hardest to get.

The way to close it is to recreate the conversation realistically enough that watching the candidate handle it tells you what a true work sample would. Put every candidate into the same close-to-real situation — the difficult customer, the objection, the hard piece of feedback — give them time to handle it, and capture how they actually performed. Now you have what a work sample provides: direct observation of the skill, scored consistently across candidates, on the same task.

That gives you the best of both worlds the research keeps pointing to — structure and a work sample, applied to roles that previously only ever got the weakest predictor in the toolkit. You stop choosing your client-facing hires on who interviews best, and start choosing on who actually performs.

The lesson from the evidence is short. If you want to predict whether someone can do the job, get as close as you can to watching them do it. For client-facing roles, that's finally possible.