Reference Check Questions That Actually Predict Performance

Most reference checks are worthless. They confirm dates and titles, ask generic questions like “Would you hire them again?”, and produce glowing reviews that tell you nothing about how the candidate will actually perform. According to a study published in the International Journal of Selection and Assessment, traditional reference checks have a predictive validity of only 0.13 — barely better than chance.

But reference checks don’t have to be useless. Research from the Consortium for Advanced Research in Talent Analytics shows that structured, behaviorally-focused reference interviews have a predictive validity of 0.29-0.36 — making them as predictive as structured interviews and more predictive than unstructured interviews.

The difference is in the questions you ask. This guide provides research-backed reference check questions that actually predict job performance.

Why Most Reference Checks Fail

Common Mistakes

1. Asking yes/no questions: “Was she a good employee?” gets a yes. Now what?
2. Accepting vague praise: “He was great!” tells you nothing actionable
3. Only talking to candidate-selected references: These will always be positive
4. Asking about the past, not about work behaviors: Dates and titles don’t predict performance
5. Not probing: Accepting the first answer without follow-up

What the Research Says

According to Schmidt and Hunter’s meta-analysis of hiring methods:

• Reference checks (traditional): 0.13 predictive validity
• Reference checks (structured): 0.29-0.36 predictive validity
• Structured interviews: 0.51 predictive validity
• Cognitive ability tests: 0.51 predictive validity
• Work sample tests: 0.54 predictive validity

Structured reference checks are as predictive as structured interviews — if you ask the right questions.

The Predictive Reference Check Framework

Before the Call: Preparation

Select references strategically:

• Require at least 2 former managers and 1 peer
• Ask for references from the last 5 years
• If possible, find references the candidate didn’t select (LinkedIn can help)
• Prepare role-specific questions based on the competencies you’re hiring for

Review the candidate’s interview performance:

• What areas were strongest/weakest?
• What concerns emerged?
• What do you want validation on?

During the Call: Structure

Opening (2 minutes)

“Thank you for taking the time to speak with me. I’m [Name], [Title] at [Company], and I’m calling about [Candidate Name] who’s being considered for our [Role Title] position. This conversation will take about 15-20 minutes. Everything you share will be kept confidential and used only for this hiring decision. I’m looking for honest, specific feedback — including areas where [Candidate] could grow.”

Setting expectations for honesty:

“I find that the most helpful references are candid ones. No one is perfect, and understanding both strengths and development areas helps us set the candidate up for success. I’d rather hear the full picture than just the highlights.”

The Predictive Questions

Category 1: Work Performance (Most Predictive)

Question 1: Context and Role

“Can you describe [Candidate]’s role and responsibilities while they reported to you? What were the key outcomes they were responsible for?”

This establishes context for all subsequent answers.

Question 2: Performance Relative to Peers (The #1 Predictive Question)

“Of all the people you’ve managed in similar roles, where would you rank [Candidate] — top 5%, top 10%, top 25%, top 50%, or bottom half?”

This is the single most predictive reference question, according to research by Frank Schmidt. Rankings force specificity and prevent inflated generalities.

Question 3: Specific Accomplishments

“What were [Candidate]’s two or three most significant accomplishments during their time with you? What made those accomplishments stand out?”

Listen for: specificity, impact metrics, attribution of their personal contribution.

Question 4: Areas for Development

“If you could give [Candidate] one piece of advice for their next role, what would it be? What’s an area where they could grow or improve?”

Everyone has development areas. If the reference can’t name one, they’re not being candid.

Question 5: Rehire Question (Behavioral Version)

“If you had an appropriate opening on your team today, would you enthusiastically rehire [Candidate]? Why or why not?”

“Enthusiastically” is the key word — it differentiates between “I guess so” and “Absolutely.”

Category 2: Role-Specific Competencies

Tailor these questions to the specific competencies the role requires:

For leadership roles:

“How would you describe [Candidate]’s leadership style? Can you give me a specific example of a time they led their team through a challenge?”

For technical roles:

“How would you rate [Candidate]’s technical depth compared to others at their level? Can you describe the most technically challenging work they did?”

For collaborative roles:

“How effectively did [Candidate] work cross-functionally? Can you describe a project where they had to collaborate with multiple teams?”

For customer-facing roles:

“How would [Candidate]’s customers or clients describe working with them? What feedback did you receive about their customer relationships?”

For growth-stage roles:

“How comfortable is [Candidate] with ambiguity and changing priorities? Can you describe how they handled a significant change or pivot?”

Category 3: Work Style and Cultural Factors

Question 6: Working Style

“How would you describe [Candidate]’s working style? Do they prefer structure or autonomy? How do they handle deadlines and pressure?”

Question 7: Communication

“How would you rate [Candidate]’s communication skills — both written and verbal? How effectively did they communicate with different audiences?”

Question 8: Coachability

“How receptive is [Candidate] to feedback? Can you give me an example of a time they received constructive criticism and how they responded?”

Question 9: Self-Awareness

“How well does [Candidate] understand their own strengths and weaknesses? Do they seek out feedback proactively?”

Category 4: Growth Trajectory

Question 10: Trajectory

“During the time you worked with [Candidate], how did they grow and develop? Did their responsibilities increase? Did they take on new challenges?”

After the Call: Evaluation

Reference Scorecard:

Reference Name: _________________
Relationship to Candidate: _________________
Duration of Working Relationship: _________________

Performance Ranking: [Top 5%] [Top 10%] [Top 25%] [Top 50%] [Bottom 50%]
Enthusiasm Level: [Would enthusiastically rehire] [Would rehire] [Hesitant] [Would not rehire]

Strengths (specific examples):
1. _________________________________________________
2. _________________________________________________

Development Areas (specific examples):
1. _________________________________________________
2. _________________________________________________

Role-Specific Competency Ratings:
- [Competency 1]: [1-5] — Evidence: _________________
- [Competency 2]: [1-5] — Evidence: _________________
- [Competency 3]: [1-5] — Evidence: _________________

Red Flags: _________________________________________________
Green Flags: _________________________________________________

Overall Assessment: _________________________________________________

Red Flags in Reference Checks

Watch for these warning signs:

For concerns about reference integrity, see our guide on AI fraud in hiring

Green Flags in Reference Checks

Reference Check Compliance

Legal Considerations

• Get candidate consent: Always obtain written authorization before checking references
• Ask job-related questions only: Focus on performance, skills, and work behaviors
• Document everything: Keep records of all reference check conversations
• Apply consistently: Check references for every candidate at the same stage
• Follow FCRA (U.S.): If using a third-party service, comply with Fair Credit Reporting Act requirements

What You Can and Cannot Ask

Can ask:

• Job performance and accomplishments
• Work behaviors and work style
• Skills and competencies
• Attendance and reliability
• Whether they would rehire

Cannot ask (in most jurisdictions):

• Age, race, gender, religion, marital status
• Disability or medical conditions
• Salary history (in many states)
• Political affiliation
• Family planning

Integrating References with Your Hiring Process

When to Check References

The ideal timing is after the final interview but before extending a formal offer. This allows you to:

• Validate interview impressions
• Address any concerns that emerged during interviews
• Make a more informed offer decision

How Many References to Check

• Minimum: 2 (one former manager, one peer)
• Ideal: 3 (two former managers, one peer or direct report)
• For senior roles: 4-5 (including skip-level manager or board member)

Reference-Interview Alignment

Compare reference feedback with interview assessments:

Misalignment isn’t automatically bad — it may reflect different contexts. But it warrants deeper investigation.

For complete interview evaluation guidance, see our interview scorecard template

Frequently Asked Questions

What if a reference won’t say anything negative?

Ask more specific questions. Instead of “Any weaknesses?” try: “What advice would you give [Candidate] for their next role?” or “In what situations does [Candidate] perform best vs. struggle?” Specificity makes it harder to give only positive answers.

Can I check references that the candidate didn’t provide?

Yes, with caution. You can contact people at the candidate’s previous companies through LinkedIn or other professional channels. However, be transparent with the candidate: “We may contact other references at your previous companies. Is there anyone you’d prefer we not contact?” Some states have specific rules about this.

What if references contradict each other?

Weigh the reference based on: (1) duration of the relationship (longer = more reliable), (2) specificity of feedback (more specific = more credible), (3) direct reporting relationship (manager > peer), and (4) recency (recent = more relevant). If 2 out of 3 references say the same thing, that’s a strong signal.

Should I do reference checks for entry-level candidates?

Yes, but adjust expectations. Entry-level candidates may have fewer professional references. Accept professors, internship supervisors, volunteer coordinators, or project collaborators. Focus questions on work ethic, learning ability, and potential rather than role-specific performance.

How do I handle a bad reference for an otherwise strong candidate?

Don’t automatically reject the candidate. Consider: (1) Is this reference a reliable source? (2) Is the feedback consistent with other references? (3) Is the concern role-specific or general? (4) How long ago was this experience? If the concern is valid and relevant, discuss it with the candidate transparently before making a final decision.

Ready to transform your hiring? Try EasyHire AI free or Book a demo to integrate structured reference checks into your AI-powered hiring process.