Archaeology can provide two bodies of information relevant to the understanding of the evolution of human cognition – the timing of developments, and the evolutionary context of these developments. The challenge is methodological. Archaeology must document attributes that have direct implications for underlying cognitive mechanisms. One example of such a cognitive archaeology is found in spatial cognition. The archaeological record documents an evolutionary sequence that begins with ape-equivalent spatial abilities 2.5 million years ago and ends with the appearance of modern (...) abilities in the still remote past of 400,000 years ago. The timing of these developments reveals two major episodes in the evolution in spatial ability, one, 1.5 million years ago and the other, one million years later. The two episodes of development in spatial cognition had very different evolutionary contexts. The first was associated with the shift to an open country adaptive niche that occurred early in the time range of Homo erectus. The second was associated with no clear adaptive shift, though it does appear to have coincided with the invasion of more hostile environments and the appearance of systematic hunting of large mammals. Neither, however, occurred in a context of modern hunting and gathering. Key Words: Archaeology; evolution; Homo erectus; spatial cognition; symmetry. (shrink)

Touch requires that one move in concert with one's tactile object. This provokes the question how joint movement of this sort yields perception of tactile qualities of the object vs. tactile qualities of an object-augmented body. Phenomenological analysis together with results of dynamic systems theory (in psychology) suggest that the difference stems from 'resonant' vs. 'reverberant' modalities of body-object movement. The further suggestion is that tactile movement is itself a form of discriminative intelligence, and that the peculiar intimacy of touch (...) and movement can shed light on a general role of movement in perception, subject-object relations, and intelligence. (shrink)