Overcoming Individual Limitations Through Distributed Computation: Rational Information Accumulation in Multigenerational Populations

Mathew D. Hardy, Peaks M. Krafft, Bill Thompson, Thomas L. Griffiths

Research output: Contribution to journalArticlepeer-review

Abstract

Many of the computational problems people face are difficult to solve under the limited time and cognitive resources available to them. Overcoming these limitations through social interaction is one of the most distinctive features of human intelligence. In this paper, we show that information accumulation in multigenerational social networks can be produced by a form of distributed Bayesian inference that allows individuals to benefit from the experience of previous generations while expending little cognitive effort. In doing so, we provide a criterion for assessing the rationality of a population that extends traditional analyses of the rationality of individuals. We tested the predictions of this analysis in two highly controlled behavioral experiments where the social transmission structure closely matched the assumptions of our model. Participants made decisions on simple categorization tasks that relied on and contributed to accumulated knowledge. Success required these microsocieties to accumulate information distributed across people and time. Our findings illustrate how in certain settings, distributed computation at the group level can pool information and resources, allowing limited individuals to perform effectively on complex tasks.

Original languageEnglish (US)
Pages (from-to)550-573
Number of pages24
JournalTopics in Cognitive Science
Volume14
Issue number3
DOIs
StatePublished - Jul 2022

All Science Journal Classification (ASJC) codes

  • Experimental and Cognitive Psychology
  • Human-Computer Interaction
  • Linguistics and Language
  • Cognitive Neuroscience
  • Artificial Intelligence

Keywords

  • Bayesian inference
  • Collective intelligence
  • Cultural evolution
  • Distributed computation
  • Group rationality
  • Social learning

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