When they reach their 20s, parents have already started worrying, so traditions ask us to get married.

BBC: Q&A: Chinese dating consultant Zhou Xiaopeng

And once the worrying women started making errors, they made them at a higher rate than the other subjects, suggesting that the extra effort the anxiety caused was taking a toll, Dr. Moser says.

WSJ: Anxiety Can Bring Out the Best

Smith said the team just started spitballing ideas about games they would like to play without worrying about sales or marketing.

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