Display options
Share it on

Front Integr Neurosci. 2012 Sep 24;6:80. doi: 10.3389/fnint.2012.00080. eCollection 2012.

A quantitative philology of introspection.

Frontiers in integrative neuroscience

Carlos G Diuk, D Fernandez Slezak, I Raskovsky, M Sigman, G A Cecchi

Affiliations

  1. Department of Psychology, Princeton Neuroscience Institute, Princeton University Princeton, NJ, USA.

PMID: 23015783 PMCID: PMC3449397 DOI: 10.3389/fnint.2012.00080

Abstract

The cultural evolution of introspective thought has been recognized to undergo a drastic change during the middle of the first millennium BC. This period, known as the "Axial Age," saw the birth of religions and philosophies still alive in modern culture, as well as the transition from orality to literacy-which led to the hypothesis of a link between introspection and literacy. Here we set out to examine the evolution of introspection in the Axial Age, studying the cultural record of the Greco-Roman and Judeo-Christian literary traditions. Using a statistical measure of semantic similarity, we identify a single "arrow of time" in the Old and New Testaments of the Bible, and a more complex non-monotonic dynamics in the Greco-Roman tradition reflecting the rise and fall of the respective societies. A comparable analysis of the twentieth century cultural record shows a steady increase in the incidence of introspective topics, punctuated by abrupt declines during and preceding the First and Second World Wars. Our results show that (a) it is possible to devise a consistent metric to quantify the history of a high-level concept such as introspection, cementing the path for a new quantitative philology and (b) to the extent that it is captured in the cultural record, the increased ability of human thought for self-reflection that the Axial Age brought about is still heavily determined by societal contingencies beyond the orality-literacy nexus.

Keywords: Google n-grams; introspection; latent semantic analysis; neuroscience; semantic cognition

References

  1. Proc Biol Sci. 2001 Nov 7;268(1482):2261-5 - PubMed
  2. Nature. 2009 Oct 15;461(7266):983-6 - PubMed
  3. Nature. 2007 Oct 11;449(7163):717-20 - PubMed
  4. Proc Natl Acad Sci U S A. 2002 Feb 5;99(3):1742-7 - PubMed
  5. Science. 2010 Sep 17;329(5998):1541-3 - PubMed
  6. Am J Med Genet. 1998 Sep 7;81(5):420-7 - PubMed
  7. Science. 2010 Jul 2;329(5987):47-50 - PubMed
  8. Science. 2010 Dec 3;330(6009):1359-64 - PubMed
  9. Philos Trans R Soc Lond B Biol Sci. 2009 Apr 12;364(1519):867-79 - PubMed
  10. Funct Neurol. 2007 Jan-Apr;22(1):11-5 - PubMed
  11. Science. 2009 May 8;324(5928):759-64 - PubMed
  12. Eur J Neurosci. 2007 Aug;26(3):791-9 - PubMed
  13. Lancet. 1999 Jul 10;354(9173):166 - PubMed
  14. PLoS One. 2012;7(4):e34928 - PubMed
  15. Science. 2011 Jan 14;331(6014):176-82 - PubMed
  16. Proc Natl Acad Sci U S A. 2008 Jul 1;105(26):8823-8 - PubMed

Publication Types