Case Study 2: When Your Employer Makes You Take a Personality Test

The Scenario

Marcus works at a mid-sized tech company. His manager announces that the entire team will participate in a "personality-based team building day" using the MBTI. The $5,000 program includes individual MBTI assessments, a certified facilitator, and a half-day workshop.

Marcus has read about the MBTI's psychometric problems. He's skeptical. But he also recognizes that everyone else on the team is excited about it. His manager has already praised the program. Opting out would be socially awkward and might be seen as not being a "team player."

This scenario plays out in thousands of workplaces every year. Let's examine it from multiple perspectives.

The Employee's Dilemma

Marcus faces a genuine social dilemma. The evidence says the MBTI doesn't measure what it claims to measure. But:

  • Refusing to participate looks antisocial
  • Criticizing the program publicly looks arrogant ("I know better than HR")
  • Going along with it feels intellectually dishonest
  • His type assignment might be used by colleagues to interpret his behavior ("Oh, that's such an INTJ thing to do")

The best approach is probably participation with appropriate boundaries: - Take the assessment and participate in the workshop (it's not harmful, and the conversations may be genuinely useful) - Avoid making major work decisions based on your type ("I shouldn't lead this project because I'm an INFP") - If type-based labels start being used to pigeonhole people, gently redirect to specific behaviors rather than types - Privately share evidence-based alternatives with HR if the opportunity arises

The Manager's Perspective

The manager, Sarah, approved the MBTI program because: - A colleague at another company recommended it - The facilitator's presentation was polished and persuasive - She wanted to do something to improve team dynamics - The budget was available - She had no reason to question the science — the assessment looked legitimate

Sarah is not irresponsible. She's responding to the same information asymmetry that affects most consumers of psychology: the people selling the MBTI present it with confidence and authority, while the scientific criticism exists in academic journals that Sarah has never read and has no reason to seek out.

This is the pipeline (Chapter 2) operating in the corporate world: the research criticism never reaches the decision-maker because the commercial pipeline between the Myers-Briggs Company and the corporate buyer is much more efficient than the academic pipeline between personality researchers and the corporate buyer.

The Facilitator's Position

The certified MBTI facilitator, David, invested $3,500 in his certification. He has delivered dozens of MBTI workshops and received consistently positive feedback. He genuinely believes the MBTI helps teams.

David's belief is sustained by: - The Barnum effect: Participants consistently say "wow, this is so accurate!" — which David interprets as evidence of validity rather than a predictable response to flattering generic descriptions - Positive feedback: His Kirkpatrick Level 1 evaluations are excellent. Participants enjoy the workshops - Financial investment: Acknowledging the MBTI's problems would invalidate his $3,500 certification and the income it generates - Identity-protective cognition: He's built his professional identity around MBTI delivery. Criticisms feel like personal attacks

David is not dishonest. He is a rational actor in a system where the evidence against his product never reaches him in a compelling way, and the evidence for it (participant enthusiasm) is vivid and immediate.

The HR Department's Challenge

The HR department purchased the MBTI program because: - It was recommended by the facilitator and endorsed by other companies - The ROI was difficult to measure (how do you quantify "improved team dynamics"?) - They evaluated it by participant satisfaction, which was high - They didn't have the expertise to evaluate the psychometric literature

HR departments are the primary purchasers of personality assessments, but most HR professionals are not trained in psychometrics. This creates an information asymmetry that favors commercial assessments (which are marketed aggressively) over evidence-based ones (which are not).

What Evidence-Based Team Building Looks Like

If the goal is genuinely improving team dynamics, evidence-based approaches include:

1. Psychological safety workshops. Google's Project Aristotle found that psychological safety — the belief that you can take risks without being punished — was the strongest predictor of team effectiveness. Training that builds psychological safety has evidence behind it.

2. Communication skills training. Teaching active listening, constructive feedback, and conflict resolution has stronger evidence than personality typing.

3. Role clarification. Many team conflicts stem from unclear roles and responsibilities, not personality differences. Structured role clarification exercises can address this directly.

4. Strengths-based discussion (without types). Having team members discuss what they're good at and what they need from others can generate the same "personality conversation" that MBTI provides, without the pseudoscientific framing.

5. If you must use a personality assessment, use a Big Five measure. The NEO-PI-R or BFI-2 provides dimensional scores that are psychometrically valid and can facilitate evidence-based discussion about individual differences.

Discussion Questions

  1. If you were Marcus, how would you navigate the social dynamics of participating in a team-building exercise you know is not evidence-based? Is there a way to be honest without being alienating?

  2. How should HR professionals be trained to evaluate the scientific basis of tools they purchase? What would "evidence-based HR" look like?

  3. The facilitator's belief in the MBTI is sustained by participant enthusiasm and financial investment. Is there a way to reach facilitators with the psychometric evidence that doesn't trigger identity-protective cognition?

  4. Should companies be required to use evidence-based assessments for any purpose that affects employment decisions? What about for team building only?