Every day, we leave small traces of ourselves online. And we might not realize what these traces say about us. This week, computational social scientist Sandra Matz explores how understanding what we actually do online – not just what we think we do – can help us improve our lives. Looking for a last-minute holiday gift for a fellow Hidden Brain fan? You can now give a gift subscription to Hidden Brain+!
Full Episode
This is Hidden Brain. I'm Shankar Vedantam. I have a question for you. How well do you know yourself? Chances are, you'll tell me you know yourself very well. All of us like to believe this. We feel like we know ourselves better than anyone else does. Every day we make choices based on this knowledge we have of ourselves.
We decide how to spend our money, who to vote for, where to go for dinner, based on what we know of our predilections and preferences. But our knowledge of ourselves is not always accurate. A host of biases and self-deceptions keep us from seeing ourselves clearly.
When you ask people how smart they are, or how ethical they are, or how good-looking they are, for example, majorities say they are above average, which, of course, is mathematically impossible. But it isn't just about vanity.
How many times have you gone to a restaurant you've been to before and ordered the same dish you ordered last time, only to remember after you started eating it that you didn't like it the last time? Or think about your last romantic entanglement that ended in disaster. By the time it ended, did you wonder how your past self could have gotten involved with someone so unsuitable?
Over the last few decades, researchers in a variety of disciplines have discovered there is a much better way to understand people than to ask them questions. When you ask people what books they like to read, people will tell you about the novels and biographies they think they ought to like.
If you ask them what movies they want to watch, they will tell you about the movies they aspirationally want to watch. But if instead you look at the books that people actually read or the movies they actually watch, it usually paints a different picture of their preferences.
This week on Hidden Brain, how understanding what we do instead of listening to what we say can help us make better financial choices, improve our physical and mental health, and maybe even bridge our political divides. Philosophers tell us the highest wisdom is to know ourselves. They say this precisely because knowing ourselves is difficult, not easy.
It requires self-reflection, self-awareness, and a healthy dose of humility. At Columbia University, psychologist Sandra Matz studies how one aspect of our behavior can reveal surprising truths about who we are. Sandra Matz, welcome to Hidden Brains.
Thank you so much for having me.
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