Many high school students are under so much competitive pressure. They are sometimes taught that if they don't have a 4.0 GPA, score in the 99th percentile on admissions tests, and demonstrate leadership in sports and participate in clubs, they won't get into college anywhere. Even highly credentialed professionals get caught up in this.

To be an objective leader means aligning your models with the needs of the organization. There is no question anymore that collaboration, seeking out diverse perspectives and developing new ways to look at challenges and opportunities, is a key leadership competency.

Objective leaders identify their unproductive mental models and tweak them for greater effectiveness.

We perceive through our senses a person, a situation or an event, and in an instant, we project our mental models - our fears, background and experiences - onto that perception. This often results in cognitive errors, which means we judge and respond incorrectly.

At Pixar, of course, we have all these people, and they're just used to our process now where it's a discussion; it's a discovery. It's not individual artists going and fussing off by themselves in isolation and then handing their work in.

I was a political science student.

We physicists don't like to admit it, but some of us are closet science fiction fans. We hate to admit it because it sounds undignified. But when we were children, that's when we got interested in science, for a lot of us.

My older brother was the person who got me interested in science in general. He used to tell me what he learned in school. My first memory of mathematics is probably the time that he told me about the problem of adding numbers from 1 to 100.