An integrated task-based framework for the design and evaluation of visualizations to support preferential choice

Abstract

In previous work, we proposed ValueCharts, a set of visualizations and interactive techniques to support the inspection of linear models of preferences. We now identify the need to consider the decision process in its entirety, and to redesign ValueCharts in order to support all phases of preferential choice. In this paper, we present our task-based approach to the redesign of ValueCharts grounded in recent findings from both Decision Analysis and Information Visualization. We propose a set of domain-independent tasks for the design and evaluation of interactive visualizations for preferential choice. We use the resulting framework as a basis for an analytical evaluation of ValueCharts and alternative approaches. We conclude with a detailed discussion of the redesign of our system based on our analysis.