Auteurs : Stéphane Safin ¹; Roland Juchmes ¹; Pierre Leclercq ¹

• 1 Lab for User Cognition and Innovative Design

Our research is embedded in the framework of the development of free-hand drawing-based computer assisted architectural design environment. In this paper, we study the activity of drawings duplication, observed during the paper changes in the phase of preliminary sketching. We aim at identifying the impacts of two digital sketches environments, with or without drawings interpretation, on this activity and on the graphical productions. We observe six activities, two with paper-pencil and four distributed on our two prototypes, and draw some operational conclusions for the development of software designed to support the architectural sketches in the preliminary design stage.