Abstract

This paper examines the enactment of agency in the Mars Exploration Rover mission. We argue that MER functioned as a distributed cognitive system, made up of highly specialized, though complementary, elements. To explain how a sense of shared agency was attained therein, we augment the distributed account with Tollefsen and Gallagher’s Philosophy of the Social Sciences, 47, 95-110, theory of joint agency. It claims joint actions involve a cascade of shared distal, proximal, and motor intentions, each with its own content and timescale, and that narrative processes are crucial for stabilizing shared intentions. We argue MER possessed these three levels of intention, though they fell on different elements of the distributed cognitive system, and their timescales were longer than mundane cases of joint action. Scientists, collaborating with engineers, enacted shared distal and proximal intentions, while rovers enacted the motor intentions. Moreover, we show that we-narratives, including a commitment to consensus-based operations and an epistemic strategy for discovering the geological history of Mars, constrained the formation of distal and proximal intentions such that they could genuinely be attributed to the group. Nonetheless, our distributed account does not fully capture how rovers shaped the sense of embodiment of team members. Scientists and engineers described themselves as ‘becoming the rover,’ which allowed them to have a sense of presence on Mars. We argue this can be explained by the Material Engagement Theory, which complements the distributed cognition theory.