The data are consistent in this simple but interesting finding: psychological safety seems to “live” at the level of the group. In other words, in the organization where you work, it’s likely that different groups have different interpersonal experiences; in some, it may be easy to speak up and bring your full self to work. In others, speaking up might be experienced as a last resort - as it did in some of the patient-care teams I studied. That’s because psychological safety is very much shaped by local leaders.

One of the most important things to keep in mind, wherever you work, is that the failure of an employee to speak up in a crucial moment cannot be seen. This is true whether that employee is on the front lines of customer service or sitting next to you in the executive board room. And because not offering an idea is an invisible act, it's hard to engage in real-time course correction. This means that psychologically safe workplaces have a powerful advantage in competitive industries.

Psychological safety doesn't guarantee effectiveness. It just makes it easier to find out what people have to offer. Sometimes, that's a happy surprise. But when people feel able to express themselves, and you find that what they say is not adding value, then you have a responsibility to help. To coach. And even though it's not fun to give people that kind of feedback, it's better to know that someone is in need of it than to remain in the dark. Moreover, it's only fair to let your colleagues know that the impact they're having is not what they're hoping it is.

One of the most important strategies for avoiding complex failures is emphasizing a preference for speaking up openly and quickly in your family, team, or organization. In other words, make it psychologically safe to be honest about a small thing before it snowballs into a larger failure. Too many of the large organizational failures I’ve studied could have been prevented if people had felt able to speak up earlier with their tentative concerns.

I’d go so far as to say that insisting on high standards without psychological safety is a recipe for failure—and not the good kind. People are more likely to mess up (even for things they know how to do well) when they’re stressed. Similarly, when you have a question about how to do something but don’t feel able to ask someone, you’re at risk of running headlong into a basic failure. Also, when people encounter intelligent failures, they need to feel safe enough to tell other people about them. These useful failures are no longer “intelligent” when they happen a second time.