(Teaser rates exploit present bias.)

The problem with most slippery slope arguments is that they do not provide any evidence of an actual slope:

they could think: “Oh, I should do that too!” But they might also react this way: “Well, thank goodness I’m not like those people!”

With prompted choice, you are not required to choose at all; you can simply ignore the prompt and click “next screen.”

This process is called “anchoring and adjustment.” You start with some anchor, a number you know, and adjust in the direction you think is appropriate.

So good choice architects not only have to pick a standardized way to measure but also need to think carefully about how to report the findings, so that Humans do not get confused.

Why should I bother to register if my consent has already been presumed?

To us, the directions from a GPS device are perfect nudges. Even if the nice, polite voice suggests a right turn, the voice does not complain if we decide to continue going straight.

If people know their preferences, and know that they dislike the outcome that is embedded in the default, they will probably change it.