An object-oriented analysis model of an iconic interface to Macsyma

This describes the object-oriented analysis conceptual model (OOAM) of a highly visual interface to Macsyma, which is an interactive, text-based system for performing symbolic, mathematical computations. It shows how the prominent structural features of the OOAM permit the analyst to graphically and mathematically evaluate aspects of interface perceptual quality through various metrics. The model grows like O(n) with the number, n, of mathematical operators in the interface. This kind of model is particularly suited for analyzing the user´s perception of interfaces that change over time or in which the visual aspects dominate the textual ones