Reciprocity is the near-automatic pull to give back when someone gives to us first. Examples:
What is reciprocity? Read the full idea →A taste at the supermarket makes you feel you ought to buy — the small gift quietly creates an obligation.
Diners tip more when the server leaves a mint. A tiny gift, a measurable return.
Charities that enclose free labels raise more, because the unasked-for gift triggers payback.
Pay for a friend's coffee and they feel they owe you the next round.
Give a small concession first and the other side feels pressure to concede something back.
That's just how memory works. Lock reciprocity in with a 5-minute active-recall session — spaced repetition, no signup.
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