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  1. Learning, life history, and productivity.John Bock - 2002 - Human Nature 13 (2):161-197.
    This article introduces a new model of the relationship between growth and learning and tests a set of hypotheses related to the development of adult competency using time allocation, anthropometric, and experimental task performance data collected between 1992 and 1997 in a multiethnic community in the Okavango Delta, Botswana. Building on seminal work in life history theory by Hawkes, Blurton Jones and associates, and Kaplan and associates, the punctuated development model presented here incorporates the effects of both growth and learning (...)
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  • Constraints of knowing or constraints of growing?Rebecca Bliege Bird & Douglas W. Bird - 2002 - Human Nature 13 (2):239-267.
    Recent theoretical models suggest that the difference between human and nonhuman primate life-history patterns may be due to a reliance on complex foraging strategies requiring extensive learning. These models predict that children should reach adult levels of efficiency faster when foraging is cognitively simple. We test this prediction with data on Meriam fishing, spearfishing, and shellfishing efficiency. For fishing and spearfishing, which are cognitively difficult, we can find no significant amount of variability in return rates because of experiential factors correlated (...)
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  • Children on the reef.Douglas W. Bird & Rebecca Bliege Bird - 2002 - Human Nature 13 (2):269-297.
    Meriam children are active reef-flat collectors. We demonstrate that while foraging on the reef, children are significantly less selective than adults. This difference and the precise nature of children’s selectivity while reef-flat collecting are consistent with a hypothesis that both children and adults attempt to maximize their rate of return while foraging, but in so doing they face different constraints relative to differences in walking speeds while searching. Implications of these results for general arguments about factors that shape differences between (...)
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  • A developmental model for the evolution of language and intelligence in early hominids.Sue Taylor Parker & Kathleen Rita Gibson - 1979 - Behavioral and Brain Sciences 2 (3):367-381.
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