Either 35, 36, or 39 Percent of Psychology Results Can’t Be Replicated

Facts matter: Sign up for the free Mother Jones Daily newsletter. Support our nonprofit reporting. Subscribe to our print magazine.


The Washington Post informs me today that in a new study, only 39 out of 100 published psychology studies could be replicated:

I wonder if I can replicate that headline? Let’s try the New York Times:

Huh. They say 35 out of 100. What’s going on? Maybe Science News can tell me:

Now it’s 35 out of 97. So what is the answer?

Based on the study itself, it appears that Science News has it right. It’s 35 out of 97. Using a different measure of replication, however, the answer is that 39 percent of the studies could be replicated, which might explain the Post’s 39 out of 100. And it turns out that the study actually looked at 100 results, but only 97 of them had positive findings in the first place and were therefore worth trying to replicate. But if, for some reason, you decided that all 100 original studies should be counted, you’d get the Times’ 35 out of 100.

So there you go. Depending on who you read, it’s either 35, 36, or 39 percent. Welcome to the business of science reporting.

WE'RE TAKING A SHORT BREAK…

from the big banner at the top of our pages asking for the donations that make Mother Jones' nonprofit journalism possible. But we still have upwards of $300,000 to raise by June 30, whether we get there is going to come down to the wire, and we can't afford to come up short.

If you value the reporting you get from Mother Jones and you can right now, please join your fellow readers who pitch in from time to time to keep our democracy-advancing, justice-seeking journalism charging hard (and to help us avoid a real budget crunch as June 30 approaches and our fiscal year ends).

payment methods

WE'RE TAKING A SHORT BREAK…

from the big banner at the top of our pages asking for the donations that make Mother Jones' nonprofit journalism possible. But we still have upwards of $300,000 to raise by June 30, whether we get there is going to come down to the wire, and we can't afford to come up short.

If you value the reporting you get from Mother Jones and you can right now, please join your fellow readers who pitch in from time to time to keep our democracy-advancing, justice-seeking journalism charging hard (and to help us avoid a real budget crunch as June 30 approaches and our fiscal year ends).

payment methods

We Recommend

Latest

Sign up for our free newsletter

Subscribe to the Mother Jones Daily to have our top stories delivered directly to your inbox.

Get our award-winning magazine

Save big on a full year of investigations, ideas, and insights.

Subscribe

Support our journalism

Help Mother Jones' reporters dig deep with a tax-deductible donation.

Donate