A Dynamic Systems Approach to the Development of Cognition and Action 
presents a comprehensive and detailed theory of early human development 
based on the principles of dynamic systems theory.
Beginning with their own research in motor, perceptual, and cognitive development, 
Thelen and Smith raise fundamental questions about prevailing assumptions in the field.
They propose a new theory of the development of cognition and action, 
unifying recent advances in dynamic systems theory 
with current research in neuroscience and neural development.