Why labelling somebody generous makes them generous

A collector says you are clearly someone who cares about this sort of thing before naming an amount. The sentence makes no request, contains no argument and is not obviously flattery. Donations rise, including from people who would have described themselves as unmoved by it.

What everyone sees

Attribution is heard as description — a claim about how the speaker sees you, which you can accept or dismiss. Dismissing it is harder than it sounds. Accepting a trait attribution creates a standard, and the standard is then applied by the person who accepted it rather than by the person who supplied it.

What is actually happening

Miller, Brickman and Bolen compared attribution with persuasion in school settings and found that telling children they were the sort of people who behaved in a certain way produced larger and more durable behaviour change than urging them to behave that way. Kraut tested the same manipulation with charitable giving, labelling some donors as charitable people after an initial contribution, and found higher giving in a later, unrelated solicitation among those who had been labelled. The mechanism is self-attribution rather than compliance, which is why the effect appears in the absence of the labeller and why it does not require the target to like or trust them.

Why it stays hidden

The move hides because it is not experienced as influence. There is no request to refuse and no argument to counter, so nothing triggers resistance. The subsequent behaviour feels internally generated — which it now is, since the trait has been adopted and is being enacted by its owner rather than performed for an audience.