Unstructured Interviews, and Why They Persist

The free-flowing conversation is the default in most organisations, and it predicts performance weakly. The gap between how useful it feels and how useful it is may be the largest in the field.

Once the criteria described in “Unstructured Interviews, and Why They Persist” are fixed, the practical challenge is running them consistently across assessors. A coordinator can use the productivity guide to plan review time, compare the effort spent at each stage and spot avoidable delays, without confusing administrative efficiency with the quality of the evidence collected from candidates.

For an independent benchmark, compare the process with CIPD selection methods guidance; the useful test is whether the local method remains job-related, proportionate and explainable.

Why it feels informative

You form an impression quickly and confidently, and confidence is not accuracy.

The conversation goes where you steer it, so you get answers to the questions you thought to ask.

Candidates who are similar to you are easier to talk to, which registers as competence.

And you never learn about the people you rejected, so nothing corrects the impression.

What it actually measures

Verbal fluency.

Similarity to the interviewer.

Confidence, which correlates weakly with capability and strongly with background.

Interview practice, which is a skill with its own distribution.

None of these is on the job analysis for most roles.

The specific failures

First impressions form in the opening minutes and the rest is confirmation.

Questions differ between candidates, so comparison is impossible.

Notes record impressions rather than evidence.

And the decision is made in discussion afterwards, where the loudest or most senior voice anchors everybody.

If you cannot remove it

Sometimes political rather than technical: senior people want to meet candidates and will not accept a script.

Then reframe it: this meeting is for the candidate to assess us, and it is not scored.

Keep the scored assessment separate and structured.

That arrangement preserves the meeting and removes its influence on the decision, and it is frequently accepted where removal is not.

Partial structure

Even a short list of required questions, asked of everybody, improves things measurably.

Even a rubric with three criteria.

Even scoring before discussion.

Perfect structure is not the goal; the gains from partial structure are large and the resistance to it is much lower.

What to say to a resistant interviewer

Not that their judgement is poor, which is both rude and unpersuasive.

That consistency protects the organisation, that comparable evidence makes decisions defensible, and that they will still be forming a judgement — just with better inputs.

And that the structured version takes less of their time, which is true and is the argument that usually lands.

What to check

How much of your decision rests on an unstructured conversation?

Do different candidates get asked different things?

Where is the decision actually made — in scoring, or in the discussion afterwards?

And if you removed the unstructured stage, what would you lose that is on the job analysis?

The point

The unstructured interview feels most informative and predicts weakly.

You never learn about the people you rejected, so nothing corrects the impression.

Underlying all of this

Almost everything in this collection reduces to one discipline: write down what the job requires, assess that thing directly, record the evidence, and look at your own outcomes afterwards. None of it requires buying anything, and organisations that do those four things consistently outperform ones running longer processes built from instruments chosen before the requirements were known.

The recurring pattern

The recurring failure across every section here is the same: measuring what is convenient rather than what matters, then never checking whether it predicted anything. The check is an afternoon of work once a year, and it is the step that separates a process that improves from one that merely persists.