Easy-to-process things feel truer, safer, and more appealing.
More quotesPolish is a gag.
Show someone a beautiful finished thing and they can see the money, pride and hours trapped inside it. “It sucks” now feels less like useful feedback and more like kicking over a wedding cake. So they mention the button colour, praise the effort and go home having protected everyone except the future customer.
Tape gives permission.
A crude prototype says the important decisions are still alive. People attack the idea because the idea looks capable of surviving an attack. Rough packaging keeps attention on the promise. A skeletal interface reveals whether the flow makes sense. Three provisional choices invite a real argument.
There is a limit. A scribble cannot test trust in a financial product. A cardboard control cannot reveal whether the real interaction is fast enough. Too little fidelity produces wonderfully honest feedback about something that will never exist.
The useful prototype is the cheapest believable version of the uncertainty currently being tested. Believable enough to provoke real behaviour. Cheap enough that criticism can still alter the result.
Tell people which parts are wet paint and which are concrete. Ask about the decision you can still change. Increase finish as the questions move from proposition to execution.
The useful question is less “What do you think?” and more “Which criticism can still change this thing?” If the honest answer is none, you are collecting compliments after the decision and calling them research.