Ergonomic clusters and displaced affordances in early lithic technology.

Traditional typological, technical, and cognitive approaches to early stone tools have taken an implicit Cartesian stance concerning the nature of mind. In many cases, this has led to interpretations of early technology that overemphasize its human-like features. By eschewing an epistemic mediator, 4E approaches to cognition (embodied, embedded, enactive, and extended) are in a better position to make appropriate evaluations of early hominin technical cognition that emphasize its continuity with non-human primates and ground a description of the evolution of hominin technology. This essay takes some initial steps in that direction by shifting focus away from tool types and knapping patterns toward a description based on ergonomics and Gibsonian affordances. The analysis points to the evolutionary importance of two hitherto underappreciated aspects of hominin technical systems—the emergence of ergonomic clusters instantiated in artifact form and the development of displaced affordances. [ABSTRACT FROM AUTHOR]