Imagine that you’re approaching a coffee shop. Suddenly, your eyes are drawn toward an interaction between two _______ happening outside its doors. One man sits, leaning against the glass window, with a plastic bag of belongings on the sidewalk. A woman, with her hand tenderly outstretched, _______ him some bills. As you walk past the _______ and enter the coffee shop, do you _______ pulling out few bills and giving them to the man?

If you answered yes, you’re probably _______ what social scientists from UCLA’s Bedari Kindness Institute call “elevation” — an uplifting emotion often accompanied by a(n) _______ feeling in the chest, sometimes even by tears. _______, that feeling comes with some contagious (有感染力的) kindness. Researchers from the institute have studied _______ kindness can be contagious.

What they found, in short is yes.

In the study, half of the participants watched a video titled “Unsung Hero”, which follows a young man as he _______ his daily routine often ________ to help others. The other half watched another video of a man performing impressive parkour stunts (跑酷特技). These participants ________ five $1 bills as payment for their time. Then researchers invited them to make ________ to charity. Compared with the parkour ________ , people who watched the “Unsung Hero” video gave 25% more to charity.

________ by the insights obtained from the study, researchers at the institute teamed up with YouTube Kids to plan a series of videos to encourage K-12 kids to show others ________ as a way to remove bullying.