LCD vs. UCDAt the meeting 12/7/97, Mike McCracken started off with a discussion of his view of UCD vs. LCD. We ended up talking alot about a couple of figures that looked like this:
The figure on the left is UCD: The User has Tasks that Interface wrap around to enable the user-and-task to be effective.
The figure on the right is LCD: The User needs an Interface to determine which, switch between, and solve Tasks. Some of these tasks are metacognitive tasks: Choosing the next thing to do, choosing to learn something, choosing HOW to learn something.