Dan,
I haven't explored this idea rigorously, but something I'm always
thinking about is funneling. Or maybe a better way of putting it is,
setting & fulfilling expectations. Is this the same thing as
progressive disclosure? It's certainly related to the paradox of choice.
I'm talking about building pages so there are clear indicators for
what to do next and what I should expect when I get there. An obvious
example is a shopping cart or well-designed signup funnel. But even in
information sites, you can lead users through the content in a way
that builds commitment or engagement. Slideshows accompanying
newspaper articles, for example. Suggestions for further reading based
on what the user has already viewed. Feedback, ratings, and comments.
Like I said, not very well thought out. But I would suggest "What
next?" as a design principle, if not an IA principle.
-- Kim
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