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The manipulative complexity of Lower Paleolithic stone toolmaking.

Aldo Faisal1, Dietrich Stout, Jan Apel

  • 1Department of Bioengineering, Imperial College London, London, United Kingdom. aldo.faisal@imperial.ac.uk

Plos One
|November 13, 2010
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Summary

Analyzing early stone tools reveals how cognitive evolution shaped human behavior. Our study quantifies manipulative complexity in Oldowan and Acheulean technologies, linking toolmaking to cognitive control and language evolution.

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Area of Science:

  • Paleoanthropology
  • Cognitive Neuroscience
  • Archaeology

Background:

  • Early stone tools are crucial for understanding human cognitive and behavioral evolution.
  • Interpreting stone tool data requires a framework connecting archaeological evidence to specific actions.

Purpose of the Study:

  • To characterize and compare the manipulative complexity of Oldowan and Acheulean technologies.
  • To link differences in brain activation to behavior organization during toolmaking.

Main Methods:

  • Utilized a data glove to record manual joint angles during tool replication.
  • Employed a measure of behavioral complexity based on joint movement statistics.

Main Results:

  • Confirmed that brain activation differences reflect higher-level behavior organization, not lower-level manipulative complexity.
  • Found no significant differences in manipulative complexity between Oldowan and Acheulean toolmaking.

Conclusions:

  • Early technological evolution relied on perceptual-motor capacities, while later stages emphasized cognitive control.
  • Suggests potential links between stone toolmaking, cognitive control, and language evolution.