ABSTRACT
Why Bother About Mental Models in Human-Computer Interaction? . . . . . . . . . . . . . . . . . . . . . .53
Examples of Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53
Examples of Valid Relations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55
