I created simple statistical model (on a sample of people in the U.S.) to help predict how depressed someone is, based on 91 variables about them. I was attempting to predict the severity of the depression by their PHQ9 score, a simple subjective scale that averages scores on 9 common symptoms of depression. For instance, it asks how often you have experienced feeling "down, depressed, or hopeles...

Here's an approach for how to use Facebook (and other social media sites) in a way that makes your life better: Start clicking and liking based on what you'd like to see in the future, rather than based on what you feel like clicking on right now. As you know, Facebook (and similar sites) monitor all your clicks and likes to determine what to show you. You can reduce the amount of clickbait...

Although self-help techniques, when tried in isolation, usually fail, I occasionally hear about an extreme intervention that had a permanent and exceptionally positive effect on the person who tried it. One notable feature of extreme improvements, as opposed to medium-sized ones, is that they probably won't just happen to you by chance. Medium-sized improvements can occur randomly, so it's har...

Naively, one might assume that people do what it benefits them to do. In fact, that's an assumption commonly made in economics. Yet it's clear that our behavior is not always in our own self-interest. People frequently buy fake supplements, try drugs they know are highly addictive, eat things they know they'll later regret, drive away the people they love most, procrastinate on really important t...

Nearly all large events use a combination of only these four simple formats for human interaction: lectures, group discussions, panels, and mixers. Yet there are more than 45 structured ways that groups of people who don't know each other can come together to interact, bond, learn, and help each other (see my full list at the bottom of this article, or click here for a spreadsheet version). Unfort...

In efforts to encourage understanding and openness on Inauguration Day, we wrote a pair of simple, short essays. One is designed to capture the views of the majority of Clinton supporters, the other, the views of the majority of Trump supporters. We had 80 supporters from each group read the corresponding essay and rate whether they agreed or disagreed with each sentence, and whether they agreed ...

What recommendations related to diet, nutrition and health seem to be universally agreed on by experts of nearly all stripes and schools of thought? Given the incredibly high levels of disagreement in these areas, and the poor quality of studies, it often seems like we know almost nothing. Below is my attempt (via a combination of brainstorming and crowdsourcing) to list what there does s...

Does warm water sometimes freeze faster than cold water when placed in the same conditions? "Absolutely no way," I said, a mere minute after I heard the claim. "People sometimes claim that NASA faked the moon landing too," I thought to myself. I pointed out why this claim is impossible. As warm water cools it must eventually reach the same temperature that the cool water started at. From that poi...

You have control over yourself for the next eight seconds. Maybe even the next three minutes. Right now you can choose to go to the gym right now. Right now you can choose to start something difficult (but valuable) that you've been putting off for a long time. But right now you can't choose to go to the gym tomorrow. You definitely can't choose to quit your job a year from now. Because tomorrow i...