Kindness priming (psychology)
Kindness priming is an affect-dependent cognitive effect in which subjects will display a positive affect following exposure to kindness. == Background == Kindness priming refers to the observed effect by which individuals who are exposed to an act of kindness – the priming – subsequently notice more of the positive features of the world than they would otherwise.
Source: Wikipedia — Kindness priming (psychology) (CC BY-SA 4.0)