Evaluation of Contextual Models

Abstract—As context-aware systems ,have ,grown ,in sophistication, they have adopted more complex contextual models. This paper steps back from the details of model contents and composition and investigates how personal and group models can be evaluated. A specific method is proposed that leverages the transition in the user’s cognitive state between “ready-at-hand” and “present-at-hand.” Index Terms— Context-aware systems, context, user modeling, model evaluation, ubiquitous computing