8Comparative developmental evolutionary psychology and cognitive ethology: Contrasting but compatible research programsIn Marc Bekoff, Colin Allen & Gordon M. Burghardt (eds.), The Cognitive Animal: Empirical and Theoretical Perspectives on Animal Cognition, Mit Press. 2002.
28Locating early homo and homo erectus tool production along the extractive foraging/cognitive continuumBehavioral and Brain Sciences 25 (3): 414-415. 2002.This commentary contests Wynn's diagnosis of the cognitive implications of the earliest stone tools and Acheulian tools. I argue that the earliest stone tools imply greater cognitive abilities than those of great apes, and that Acheulian tools imply more than the preoperational cognitive abilities Wynn suggests. Finally, I suggest an alternative adaptive scenario for the evolution of hominid cognitive abilities.