Your best interview question is the one everyone gets. So why do we rarely ask it?
A good conversation feels personal. A fair selection process is surprisingly repetitive: the same questions, the same order, the same scorecard. Not to put people in boxes, but to stop first impressions from becoming final scores.
You run two 45-minute interviews.
The first candidate brings instant energy. Fluent. Funny. A story that flows.
The second takes a moment to think. Less polished. Possibly stronger on the substance.
If you ask them completely different questions, what are you actually comparing?
The difference is not the conversation. It is the measuring stick.
In a 1994 meta-analysis published in the Journal of Applied Psychology, McDaniel, Whetzel, Schmidt and Maurer combined 245 studies and data from 86,311 people. Their conclusion: the way you build an interview changes how much it can tell you about future performance.
For job-related, structured interviews, the estimated predictive validity was .51. For job-related, unstructured interviews, it was .37.
That sounds technical. The practical point is simple: an improvised conversation can feel excellent, yet be less able to compare candidates consistently.
A conversation is not a scorecard
An unstructured interview gives every interviewer freedom. That is exactly why it can become risky.
• Different questions. One candidate gets a case. The next gets a chat about hobbies and culture fit.
• Different follow-ups. When you like someone, you dig deeper. When you doubt them, you move on sooner.
• Different standards. “Strong answer” means something different to every interviewer.
That means you are not only rewarding capability. You are also rewarding timing, chemistry and the luck of the conversation.
Structure is not robot mode
A structured interview does not mean reading a script like a customer-service bot.
It does mean deciding in advance:
• which competencies truly matter for the role;
• which questions everyone receives;
• which observable behaviours make an answer strong, average or weak;
• how each interviewer scores before comparing notes.
There is still room to be human. To ask follow-up questions. To understand context.
But the foundation shifts from “who felt best?” to “which behaviour did we actually see?”
And even good structure cannot show everything
Interviews are still conversations about behaviour. Assess4me adds another layer: candidates show behaviour while making choices, solving problems and adapting to change in a game-based environment.
Not only saying you are resilient.
Showing how you respond when the plan changes.
Not only saying you collaborate.
Showing how you use information when pressure rises.
A stronger selection process does not start with a better gut feeling. It starts with a better measuring stick.
Want to see how you can combine fairer conversations with real behavioural observation? Explore how Assess4me works.