> Looking for info on the following pattern:
> User opts to show more options, which switches modes to show more controls (or progressively discloses some more), but the option to go back to the fewer options is not given.
> Anyone know of any field testing data that may add more color to the actual usability of this pattern (as opposed to merely my or others' gut)?
I can think of one instance of this in some user testing I did some years ago. When the user switched to the advanced search there wasn't an obvious way to switch back to the "simple" version. However the decision to leave the "undo" out wasn't really a deliberate one.
People who were going in with a particular goal were fine.
The problem cases that we saw was with people who accidentally selected the option, or did it as part of exploring the interface.
The latter problem we saw as especially damaging - since when the user hit a dead end they became less likely to explore the rest of the UI.
We fixed it and turned it into a toggle.
Whether this fits your situation or not I'm not sure :-)
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