7 The cognitive basis of model - based reasoning in science

The issue of the nature of the processes or ‘mechanisms’ that underlie scientific cognition is a fundamental problem for cognitive science, as is how these facilitate and constrain scientific practices for science studies. A full theory of human cognition requires understanding the nature of what is one of its most explicitly constructed, abstract and creative forms of knowing. A rich and nuanced understanding of scientific knowledge and practice must take into account how human cognitive abilities and limitations afford and constrain the practices and products of the scientific enterprise. Here I want to focus on the issue of the cognitive basis of certain model-based reasoning practices – namely, those employed in creative reasoning leading to representational change across the sciences. Investigating this issue provides insights into a central problem of creativity in science: how are genuinely novel scientific representations created, given that their construction must begin with existing representations? I will start by considering methodological issues in studying scientific cognition; then address briefly the nature of specific model-based reasoning practices employed in science; and finally provide outlines of an account of their cognitive basis, and of how they are generative of representational change.