Groupthink can also happen when a fixed-mindset leader punishes dissent. People may not stop thinking critically, but they stop speaking up.

The fixed- and growth-mindset groups started with the same ability, but as time went on the growth-mindset groups clearly outperformed the fixed-mindset ones. And this difference became ever larger the longer the groups worked. Once again, those with the growth mindset profited from their mistakes and feedback far more than the fixed-mindset people. But what was even more interesting was how the groups functioned. The members of the growth-mindset groups were much more likely to state their honest opinions and openly express their disagreements as they communicated about their management decisions. Everyone was part of the learning process. For the fixed-mindset groups — with their concern about who was smart or dumb or their anxiety about disapproval for their ideas — that open, productive discussion did not happen. Instead, it was more like groupthink.

The fixed mindset limits achievement. It fills people’s minds with interfering thoughts, it makes effort disagreeable, and it leads to inferior learning strategies. What’s more, it makes other people into judges instead of allies. Whether we’re talking about Darwin or college students, important achievements require a clear focus, all-out effort, and a bottomless trunk full of strategies. Plus allies in learning. This is what the growth mindset gives people, and that’s why it helps their abilities grow and bear fruit.

Believing that your qualities are carved in stone — the fixed mindset — creates an urgency to prove yourself over and over. If you have only a certain amount of intelligence, a certain personality, and a certain moral character — well, then you’d better prove that you have a healthy dose of them. It simply wouldn’t do to look or feel deficient in these most basic characteristics. Some of us are trained in this mindset from an early age. Even as a child, I was focused on being smart, but the fixed mindset was really stamped in by Mrs. Wilson, my sixth-grade teacher. Unlike Alfred Binet, she believed that people’s IQ scores told the whole story of who they were. We were seated around the room in IQ order, and only the highest-IQ students could be trusted to carry the flag, clap the erasers, or take a note to the principal. Aside from the daily stomachaches she provoked with her judgmental stance, she was creating a mindset in which everyone in the class had one consuming goal — look smart, don’t look dumb. Who cared about or enjoyed learning when our whole being was at stake every time she gave us a test or called on us in class?

...remember the dangers of the New Groupthink. If it's creativity you're after, ask your employees to solve problems alone before sharing their ideas. If you want the wisdom of the crowd, gather it electronically, or in writing, and make sure people can't see each other's ideas until everyone has had a chance to contribute.

In the fixed mindset, everything is about the outcome. If you fail — or if you’re not the best — it’s all been wasted. The growth mindset allows people to value what they’re doing <i> regardless of the outcome </i>. They’re tackling problems, charting new courses, working on important issues. Maybe they haven’t found the cure for cancer, but the search was deeply meaningful.

When people with the fixed mindset opt for success over growth, what are they really trying to prove? That they’re special. Even superior.

the fixed-mindset premise that great geniuses do not need great teams. They just need little helpers to carry out their brilliant ideas.

Believing that your qualities are carved in stone — the fixed mindset — creates an urgency to prove yourself over and over. If you have only a certain amount of intelligence, a certain personality, and a certain moral character — well, then you’d better prove that you have a healthy dose of them. It simply wouldn’t do to look or feel deficient in these most basic characteristics.

...in the fixed mindset, you don’t take control of your abilities and your motivation. You look for your talent to carry you through, and when it doesn’t, well then, what else could you have done? You are not a work in progress, you’re a finished product. And finished products have to protect themselves, lament, and blame. Everything but take charge.

Dweck’s work with children revealed two mindsets in action — a “growth” mindset that generally thinks big and seeks growth and a “fixed” mindset that places artificial limits and avoids failure. Growth-minded students, as she calls them, employ better learning strategies, experience less helplessness, exhibit more positive effort, and achieve more in the classroom than their fixed-minded peers. They are less likely to place limits on their lives and more likely to reach for their potential. Dweck points out that mindsets can and do change. Like any other habit, you set your mind to it until the right mindset becomes routine.

In summary, people who believe in fixed traits feel an urgency to succeed, and when they do, they may feel more than pride. They may feel a sense of superiority, since success means that their fixed traits are better than other people’s. However, lurking behind that self-esteem of the fixed mindset is a simple question: If you’re somebody when you’re successful, what are you when you’re unsuccessful?

Every faction conditions its members to think and act a certain way. And most people do it. For most people, it's not hard to learn, to find a pattern of thought that works and stay that way. But our minds move in a dozen different directions. We can't be confined to one way of thinking, and that terrifies our leaders. It means we can't be controlled. And it means that no matter what they do, we will always cause trouble for them.

People with a fixed mindset were only interested when the feedback reflected on their ability. Their brain waves showed them paying close attention when they were told whether their answers were right or wrong.