Research shows work samples are the single highest predictor of a candidate's future success, yet most companies over-rely on conversational interviews. Integrating a hands-on project or work trial provides immense signal for the company and gives the candidate a realistic preview, which also enables powerful self-selection.

Use the maxim, "How someone does anything tells you how they do everything." Assess a candidate's preparation for the interview itself. Their research, note-taking, and follow-up are direct predictors of their future diligence and performance in the role.

At Meta, an interviewer's stated confidence in their hiring decision correlates more strongly with a candidate's future on-the-job performance than the raw interview feedback. This suggests that calibrated interviewers develop an intuitive 'gut check' that captures a candidate's potential for success beyond the formal rubric.

A common hiring mistake is prioritizing a conversational 'vibe check' over assessing actual skills. A much better approach is to give candidates a project that simulates the job's core responsibilities, providing a direct and clean signal of their capabilities.

To improve candidate experience and evaluation quality, Formation Bio structures its interview process by assigning distinct key competencies to each interviewer. This ensures every conversation is unique and valuable, preventing the common problem of candidates repeating the same stories to different team members.

Ineffective interviews try to catch candidates failing. A better approach models a collaborative rally: see how they handle challenging questions and if they can return the ball effectively. The goal is to simulate real-world problem-solving, not just grill them under pressure.

The strong impression from a job interview creates a false sense of 'knowing' who will be a good hire. This vivid, face-to-face interaction leads managers to overweight its value and discount more predictive data. Adding an unstructured interview can therefore make hiring predictions worse than using objective data alone.

Upload interview transcripts and a job description into an AI tool. Program it to define the top criteria for the role and rate each candidate's transcript against them. This provides an objective analysis that counteracts personal affinity bias and reveals details missed during the live conversation.

Senior executives are, by definition, excellent at interviewing, making the process unreliable for signal. Instead of relying on a polished performance, ask to see the 360-degree performance reviews from their previous company. This provides a more honest, ground-truth assessment of their strengths and weaknesses.