How do I spot my own blind spots before they become a problem?

The most expensive gap in your self-knowledge usually isn’t something you don’t know. It’s something everyone around you already knows, and you don’t. That’s not a failure of effort or attention. A blind spot is, by definition, invisible from the inside, which means no amount of introspection alone will ever find it. Only other people can.

Most leaders respond to that fact by trying harder to notice things about themselves. It rarely works, for the same reason you can’t see the back of your own head no matter how carefully you look. What actually closes a blind spot is a specific kind of tool, one built to locate exactly where the gap is rather than simply urging you to be more self-aware in general.

What this actually buys you as a leader of yourself

A blind spot doesn’t announce itself. It shows up as a pattern other people have quietly adjusted around, the meeting you always run long, the feedback style that lands as harsher than you intend, the habit of finishing other people’s sentences. Everyone in the room has learned to work with it. You’re the only one who doesn’t know it’s there.

Left alone, a blind spot doesn’t stay neutral. It tends to grow, because nobody is naming it and you’re not correcting for something you can’t see. Locating it isn’t about becoming a more self-critical person. It’s about finding the specific, nameable gap between what you know about yourself and what everyone else already does, so you can actually do something about it.

Why it matters

The Johari Window, developed by Luft and Ingham, remains the clearest tool for locating exactly this kind of gap. It divides self-knowledge into four areas, based on a simple cross of what is known to you and what is known to others (Luft and Ingham, 1955). The open area is what both you and others see. The hidden area is what you know but keep from others. The unknown area is what neither you nor anyone else has yet discovered. And the blind area, the one this article is about, is what others can see clearly and you cannot see at all.

Part of why the blind area persists has nothing to do with effort. Pronin, Lin and Ross found that people are consistently better at spotting bias in other people’s judgement than in their own, even when shown the exact same evidence, a pattern they termed the bias blind spot. People don’t just fail to notice their own blind spots, they actively judge themselves as less susceptible to them than everyone else, which is precisely the mechanism that keeps a blind spot in place (Pronin, Lin and Ross, 2002).

This has measurable consequences at leadership level specifically. Church found that high performing managers were distinguished less by having no weaknesses and more by how accurately their self-ratings matched how others actually rated them, self-other agreement was a stronger predictor of performance than self-rating alone (Church, 1997). Atwater and Yammarino’s research into self-other agreement found a similar pattern: leaders who significantly over-rated themselves relative to how others saw them consistently performed worse than leaders whose self-view was closely aligned with others’ view of them, regardless of how positively either group rated themselves (Atwater and Yammarino, 1992). The gap itself, not the rating, is what predicts the problem.

The Johari Window

The window isn’t fixed. Luft and Ingham’s original model treats it as something you actively resize: the open area grows either by asking for feedback, which shrinks the blind area, or by disclosing more of what you’d normally keep hidden, which shrinks the hidden area. The five exercises below work both levers.

Five practices for locating your blind spots

Exercise 1: The adjective sort

Overview: Luft and Ingham’s original method for mapping the window used a shared list of descriptive words, chosen independently by yourself and by others, then compared. The gap between the two lists is where the blind area actually lives (Luft and Ingham, 1955).

Steps:

1. Choose five or six words that could plausibly describe how you operate as a leader from the adjective sort list in the appendix below.
2. Ask three or four colleagues, ideally people who see you in different contexts, to independently pick five or six words from the same list, without seeing your choices or each other’s.
3. Compare the lists. Words that appear on your list and theirs are your open area. Words that appear on several of their lists but not yours are blind area candidates.
4. Pick one blind area word and ask the group, plainly, what specifically led them to choose it.

Variations: A shorter version works with a single trusted colleague and a list of eight to ten words if the full exercise feels too exposing to start with. In a team setting, this also works as a group exercise where everyone maps everyone else, which normalises the practice rather than singling any one person out.

Why it matters: This is the closest thing to a direct measurement of your blind area that exists, since it compares your self-perception against others’ perception on the same fixed set of terms rather than relying on open-ended, harder to compare feedback.

Exercise 2: The surprise log

Overview: A blind spot rarely announces itself directly. It shows up first as a reaction that catches you off guard, someone responding more warily, more warmly, or more critically than you expected. Pronin, Lin and Ross’s bias blind spot research suggests these moments of surprise are more trustworthy data than your own assessment of the situation, precisely because your own read is the thing most likely to be off (Pronin, Lin and Ross, 2002).

Steps:

1. For two weeks, keep a short running note of any moment where someone’s reaction to you genuinely surprises you, in either direction.
2. For each entry, note what you did or said, and what reaction you expected.
3. Note the actual reaction, as specifically as you can, rather than your interpretation of it.
4. At the end of two weeks, read the log in one sitting rather than reviewing entries as they happen.
5. Look for a repeated theme across entries. A single surprise is noise. A repeated one is signal.

Variations: If two weeks produces too few entries to see a pattern, extend to a month. Some find it more useful to log only surprises connected to a specific area, such as meetings or written communication, rather than casting the net broadly.

Why it matters: This exercise turns something you’d normally shrug off in the moment into structured evidence over time, which is exactly the kind of accumulated pattern that reveals a blind area far more reliably than any single incident.

Exercise 3: The feedback circle

Overview: A structured group technique, traced back to Luft and Ingham’s own facilitation practice, built specifically to surface blind spot material in a live setting rather than relying on people to volunteer it unprompted. A small group takes turns, one person receiving specific observations from everyone else while listening without responding, defending, or explaining (Luft and Ingham, 1955).

Steps:

1. Gather three to six people who work with you regularly and would be willing to give this a genuine try.
2. One at a time, each person becomes the receiver. Everyone else shares one specific, plainly stated observation about how that person operates, not a general impression.
3. The receiver listens without responding, defending, or explaining. A clarifying question is fine if something genuinely isn’t clear, a defending one isn’t.
4. Once everyone has spoken, the receiver notes the two or three observations that land hardest, even if uncomfortable, before saying anything back to the group.
5. Rotate until everyone has had a turn as receiver.

Variations: This works well tacked onto the end of a project retrospective, since there’s already concrete, recent material for people to draw observations from. A group of three is a lower stakes way to start if a full circle feels too exposing.

Why it matters: This separates giving feedback from having it immediately negotiated away in the moment, which is what usually happens when a candid observation meets a live defensive response. The discipline of listening without responding is what lets blind spot content actually register, rather than get quietly argued down before it lands.

Exercise 4: The one question 360

Overview: A full 360 review is a substantial undertaking. A single, well chosen question sent to several people at once gets much of the same value with a fraction of the effort, and unlike a formal review, it’s light enough to run repeatedly rather than once a year.

Steps:

1. Choose one specific, concrete question, such as whether you interrupt in meetings, or what’s one thing you do that gets in your own way.
2. Send the same question to four or five people who’d genuinely know the answer, individually rather than as a group thread.
3. Ask them to answer briefly and honestly, and make clear you’re not looking for reassurance.
4. Read all the answers together before reacting to any single one.
5. Where several answers agree, treat that as the priority, regardless of how it compares to your own view of the situation.

Variations: Run this on a quarterly cadence rather than as a one-off, rotating to a different specific question each time. The value compounds with repetition in a way a single round never will, since it builds a habit others come to expect rather than a one-time audit.

Why it matters: A single question, asked of several people at once, is specific enough to get a real answer and light enough to actually repeat, which matters more for closing a blind area than any one deep but rare review.

Exercise 5: The disclosure trade

Overview: The Johari Window only grows the open area through two moves: seeking feedback, which shrinks the blind area, and disclosing more of what you’d normally keep hidden, which shrinks the hidden area. The two reinforce each other, since people tend to offer more candid feedback once you’ve shown some willingness to be candid yourself (Luft and Ingham, 1955).

Steps:

1. Choose one thing from your hidden area, a genuine uncertainty, a mistake, a concern you’ve been keeping to yourself, appropriate to share with a trusted colleague.
2. Share it plainly, without minimising it or immediately following it with reassurance.
3. Notice how the conversation shifts afterwards, and whether it opens space for them to be more candid with you in return.
4. If it does, use that opening to ask directly whether there’s something about your leadership they’ve been holding back from you.
5. Treat this as a repeatable pattern, not a single disclosure, since trust built this way tends to compound over several exchanges rather than one.

Variations: Start with something lower stakes if a genuine vulnerability feels too exposing at first. The mechanism works the same way at smaller scale, it simply takes longer to build the same trust.

Why it matters: Most leaders try to shrink their blind area by asking harder, without noticing that willingness to disclose is often what earns the right to an honest answer in the first place.

Exercise wrap up

These five exercises work both sides of the same window: the adjective sort, surprise log, candour audit and one question 360 are all aimed at shrinking the blind area, while the disclosure trade works the hidden area in a way that tends to make the others more effective too. You don’t need all five running at once. Two or three, done consistently, will move the window further than all five attempted once and abandoned. Not every week allows for that level of deliberate practice, which is where the micro-practices below come in.

Five micro-practices to start today

Five things you can start doing today, no dedicated time required.

1. When someone’s reaction to you genuinely surprises you, don’t just note it and move on, ask them about it. “You seemed surprised just then, what were you expecting?” turns a moment of monitoring into inquiry, and gets you an actual answer instead of your best guess at one.
2. Before assuming your read of a meeting was accurate, ask one person who was there whether they saw it the same way. Reading the room is monitoring, not inquiry, and the two produce very different quality answers.
3. Notice when you’re rating yourself more favourably than the evidence in front of you actually supports, name it to yourself plainly, then ask someone who’d actually know whether that read holds up. The instinct to assume you’re the exception to a bias is usually the bias operating, not evidence against it.
4. Share one small thing you’ve been keeping to yourself with someone you trust, then ask directly afterwards whether there’s something about you they’ve been holding back too. Disclosure tends to earn more honesty in return than simply asking for it does.
5. Once this week, ask someone directly what they see that you might not, and let them finish answering before you respond to any of it.

Conclusion

A blind spot isn’t a sign you haven’t tried hard enough to know yourself. It’s a structural feature of self-knowledge, the one area no amount of introspection can reach on its own. The Johari Window doesn’t fix that by asking you to look harder. It gives you a specific way to locate the gap, and two concrete levers, asking and disclosing, for closing it.

Reflective questions

• If you asked four people who see you in different contexts, how confident are you that their answers would agree with each other?
• Think of a moment someone’s reaction to you genuinely surprised you. What did you do with that surprise at the time?
• What’s one thing you’ve been keeping in your hidden area that, if shared, might actually earn you more honest feedback in return?

Explore further

• Self-awareness: why knowing yourself and being known are two different skills, the first piece in this series, which this article builds on directly
• Feedback seeking behaviour: why waiting for it keeps you in the dark, for more on actively closing this exact gap
• The feedback resources hub, for more on structured approaches to giving and receiving feedback

Sources

Atwater, L.E. and Yammarino, F.J., 1992. Does self-other agreement on leadership perceptions moderate the validity of leadership and performance predictions? Personnel Psychology, 45(1), pp.141-164.

Church, A.H., 1997. Managerial self-awareness in high-performing individuals in organizations. Journal of Applied Psychology, 82(2), pp.281-292.

Luft, J. and Ingham, H., 1955. The Johari window, a graphic model of interpersonal awareness. Proceedings of the western training laboratory in group development. Los Angeles: University of California, Los Angeles.

Pronin, E., Lin, D.Y. and Ross, L., 2002. The bias blind spot: Perceptions of bias in self versus others. Personality and Social Psychology Bulletin, 28(3), pp.369-381.

Appendix: the adjective sort word list

Use this list for Exercise 1, the adjective sort. Both you and the colleagues you ask should choose independently from this same list, without seeing each other’s picks.