The Thank-You Multiplier
Being thanked doubles how likely you are to help the next person who asks. The effect passes through strangers. It's not the words. It's what they signal.
One specific thank-you changes the next favor you're asked for, even by someone unrelated.
Adam Grant and Francesca Gino ran the test in 2010. Participants who helped edit a student's cover letter were either thanked or not. Later, a different student asked for help. Those who had been thanked agreed 55 percent of the time. Those who weren't, 25 percent. More than double, for a stranger.
The mechanism isn't mood. It's social worth. Gratitude signals that your effort was seen and valued. That signal lowers the cost of offering help next time (to anyone). Unseen effort doesn't generalize. Seen effort does.
The nudge: End one meeting this week by naming one specific thing one specific person did. Not "great work everyone." Something like: "Priya rewrote the onboarding doc three times until it actually made sense. That saved us a quarter of questions." Watch who helps whom over the next 48 hours.
