ECA infers change in ancestral human cognition from the archaeological record, often drawing on the theories, methods, and data of other disciplines:
cognitive science,
comparative cognition,
paleoneurology, experimental replication, and hands-on participation in the manufacture and use of traditional technologies. For example, the 3.3-million-year history of
stone tool use has been used to suggest change in cognitive capacities such as
intelligence,
spatial reasoning,
working memory, and
executive functioning, as defined by and understood through cognitive psychology and as operationalized to permit their detection in the archaeological record. Other ECA investigations have focused on the development of domain-specific abilities, including
theory of mind,
visual perception and
visuospatial abilities, technological reasoning,
language,
numeracy, and
literacy. ECA is broadly analogous to
Steven Mithen's categories of cognitive-processual and evolutionary-cognitive archaeology. Within ECA, there are two main schools of thought. The North American ECA school began in the mid-1970s with the pioneering work of archaeologist
Thomas G. Wynn It focuses on understanding human cognitive evolution, either from the artifactual record of forms like stone tools, comparisons of ancestral tool use with that of contemporary species (typically but not exclusively, non-human
primates), or both. It often involves descriptive pattern analysis: analyzing change in a form like stone tools over millions of years and interpreting that change in terms of its cognitive significance using theories, constructs, and paradigms from cognitive psychology and neuroscience. East of the Atlantic, the British ECA school also began in the mid-1970s with the work of archaeologists
Colin Renfrew and
John Gowlett and evolutionary primatologist William McGrew. Renfrew's work in particular, as well as that of his student,
Lambros Malafouris, has taken a philosophical approach to the study of the ancient mind, drawing on concepts from the
philosophy of mind and
ecological psychology to examine the role of material structures in human cognition more fundamentally. Renfrew and Malafouris coined the term
neuroarchaeology to describe their approach. Renfrew sought to incorporate meaning and symbols in material culture (key pursuits in the developing Post-Processual archaeology of the time) within a framework or structure that would be more empirically testable. ECA is concerned with how humans think through material structures, with the ability to leverage and exploit material structures for cognitive purposes perhaps being what truly sets human cognition apart from that of all other species. Pottery making is a typical example of this approach. Malafouris does not see the vase as a form created by the potter imposing an internal mental concept on external clay. Instead, the potter's brain and body interact with his materials, the clay and the wheel; the form assumed by the clay is ultimately produced by the complex interaction between the potter's perception of the feel of the clay, the pressure of his fingers on it, and its reactions of texture, moisture content, color, balance, and form. Another example is the work on the cognitive role of material forms in number concepts by
Karenleigh A. Overmann, who sees them as the source of properties like discreteness. archaeologist Iain Davidson, and psychologist William Noble. Today, ECA integrates interdisciplinary data from human
psychology and
neurophysiology,
social anthropology,
physical anthropology,
comparative cognition, and
artificial intelligence. As a vibrant and expanding field of inquiry, "[ECA continues to] develop many of the same themes raised in the formative decade of cognitive archaeology: the validity and use of ethnoarchaeological and experimental methods; the question of continuities and discontinuities between humans and non-human species; the selection and application of theoretical frameworks, including the displacement of Piagetian theory by contemporary psychological and neuroscientific approaches to brain function and form; the incorporation of interdisciplinary data; the origin of language; the ability of construing intentionality from artifactual form; the philosophical turn in cognitive archaeology; and the riddle of intergenerational accumulation and transmission." ==Ideational cognitive archaeology==