Structured Interviews: The Highest-ROI Change Most Teams Never Make

In the most cited meta-analysis of selection methods, structured interviews consistently outperform unstructured interviews at predicting job performance. The mechanism is simple: when every candidate answers the same questions against the same rubric, you are comparing evidence instead of comparing impressions.

What 'structured' actually means

1. 01Define the four to six competencies the role genuinely requires — derived from the work, not from a template.
2. 02Write two questions per competency in advance and ask them of every candidate in the same order.
3. 03Use behavioral prompts ('Tell me about a time you...') and situational prompts ('What would you do if...') rather than hypotheticals about personality.
4. 04Score each answer immediately on a defined scale, with written anchors describing what a 1, 3, and 5 look like.
5. 05Have interviewers submit scores before the debrief so the loudest voice in the room does not set the anchor.

Why it also reduces legal exposure

Consistent questions and documented scores create a defensible record of why one candidate was selected. Unstructured interviews leave you with nothing but recollection, which is a weak position if a hiring decision is ever challenged.

Questions to remove from your kit

• Salary history — prohibited or restricted in a growing number of states and cities. Ask for salary expectations instead, and publish a range.
• Anything touching age, family status, pregnancy, national origin, religion, disability, or arrest record.
• Culture-fit questions with no job link ('Would I want to get a beer with this person?'). Replace with culture-add and competency evidence.

A workable scorecard

One page. Competency, question asked, evidence heard, score, and a one-line rationale. If an interviewer cannot write the evidence line, they did not probe far enough — and the score should not count.