I can be honest and tell you that your butt is a mile wide.

I'm Angela Duckworth.

I'm Stephen Dubner.

And you're listening to No Stupid Questions.

Today on the show, are first impressions or last impressions more important?

Hey, how are you doing?

Smiley face?

And then the person is like, good email.

Also, where does wisdom come from? As I get older, maybe total delusion, but I feel like I'm getting wiser.

Angela, the following question came from a listener. And one reason I'm so interested is that it involves one of my

favorite ever pieces of research which has to do with colonoscopies. I mean, who does not love

colonoscopy research? I'm about to have one, so don't scare me. Thanks for sharing that.

I'm 50. You're supposed to have one when you're 50.

Yeah, and we appreciate your vigilance.

So anyway, this email is from a listener named Sam Cohn, who happens to be a nursing student, and he wants to know this.

Are first impressions or last impressions more impactful?

What a great question. All right, you're thinking about the

colonoscopy study. I mean, honestly, there's only one colonoscopy study. Well, there are many

colonoscopy studies in the medical literature, but only one in the psychology literature that I'm

aware of. Exactly. That social scientists would know about and care about. And that's the famous

Danny Kahneman and colleagues study about peak and about. And that's the famous Danny Conneman and colleagues

study about peak and end. The peak end theory. Yeah. So can you tell us about the peak

...