Karl Fast on Interactionism, part 2

Embodied cognition redefines the mind not as a localized brain function, but as a system extending into the body, tools, and environment. Information architecture and interaction design must evolve to account for this, moving beyond simple perception-action loops to embrace "interactionism"—a perspective that treats action and reaction as a unified, continuous process. Research into epistemic actions, such as manipulating physical objects to simplify mental computation, demonstrates that the environment actively shapes cognitive performance. The "Rat Park" experiments further illustrate how social and environmental contexts fundamentally alter biological and behavioral outcomes, including addiction. As computational tools become increasingly pervasive, designers must shift their focus from static aesthetic qualities to the dynamic touchpoints between humans and their environments, ensuring that digital systems effectively augment rather than merely exist alongside human cognition.