otp , 6 hours ago

At least it was a stupid mistake rather than poor study design.

And one that kind of makes sense how it’d happen, too.

“We don’t have any more data on these couples after a few sessions. What does that mean?”

“Oh, well we don’t follow up with divorced couples, so we wouldn’t have more data after the divorce date. Tag them as divorced.”

Disclaimer: Hypothetical scenario I’ve imagined to explain the error. Not based in reality.