Knowledge Distribution and the Effect of Design Tools on the Design Process

Abstract

This paper compares the cognitive performance of architecture students when designing tasks using one of the three design tools: pencil and paper, software Sketch Up and Rhinoceros 3D. It questions if a design tool can affect when knowledge is generated and used in the duration of design activity. This is explored through a protocol 'think aloud' study for which a new coding scheme was developed. The methodology is grounded on the theory of Distributed Cognition and Zhang and Norman's (1994) method of 'representational analysis', based on which, knowledge is either 'internal' in that it is actively memorized by the designer or is 'external' in that it is implicitly made available via a stimuli like a design tool. Using an Analysis of Variance (ANOVA) test, for the five participants of this study, external knowledge generated significantly earlier on within the process when using Sketch Up compared to the other two tools.