Cognitive limitations such as those described in Millers (1956) work on channel capacity and Cowens (2001) on short-term memory are factors in describing user cognitive load and in turn task performance. Inappropriate user cognitive load can reduce user efficiency in goal realization and so in the task of text search the interface should allow users to draw on their powerful and innate pattern recognition abilities. This harmonizes with Johnson-Lairds (1983) proposal that propositional representation is tied to mental models. An appropriate approach would be to graphically present single...