Evidence map›Paper›PMID 27872286›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2016

Linguistic positivity in historical texts reflects dynamic environmental and psychological factors.

Rumen Iliev, Joe Hoover, Morteza Dehghani, Robert Axelrod

Erratum issuedAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed.

  1. Article
  2. The Valence of Abstraction: A Paradox Revisited.Journal of psycholinguistic research · 2024
    Article
  3. Article
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  6. Article
  7. The rise and fall of rationality in language.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  8. Reply to Schmidt et al.: A robust surge of cognitive distortions in historical language.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  9. Historical language records reveal a surge of cognitive distortions in recent decades.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  10. Article
  11. The rise of prosociality in fiction preceded democratic revolutions in Early Modern Europe.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  12. Article
  13. Article
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors.

Rumen IlievGerald R. Ford School of Public Policy, University of Michigan, Ann Arbor, MI 48109; axe@umich.edu rumen.i.iliev@gmail.com.
Joe HooverDepartment of Psychology, University of Southern California, Los Angeles, CA 90089.
Morteza DehghaniDepartment of Psychology, University of Southern California, Los Angeles, CA 90089.
Robert AxelrodGerald R. Ford School of Public Policy, University of Michigan, Ann Arbor, MI 48109; axe@umich.edu rumen.i.iliev@gmail.com.ORCID 0000-0003-4758-6590

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

People use more positive words than negative words. Referred to as "linguistic positivity bias" (LPB), this effect has been found across cultures and languages, prompting the conclusion that it is a panhuman tendency. However, although multiple competing explanations of LPB have been proposed, there is still no consensus on what mechanism(s) generate LPB or even on whether it is driven primarily by universal cognitive features or by environmental factors. In this work we propose that LPB has remained unresolved because previous research has neglected an essential dimension of language: time. In four studies conducted with two independent, time-stamped text corpora (Google books Ngrams and the New York Times), we found that LPB in American English has decreased during the last two centuries. We also observed dynamic fluctuations in LPB that were predicted by changes in objective environment, i.e., war and economic hardships, and by changes in national subjective happiness. In addition to providing evidence that LPB is a dynamic phenomenon, these results suggest that cognitive mechanisms alone cannot account for the observed dynamic fluctuations in LPB. At the least, LPB likely arises from multiple interacting mechanisms involving subjective, objective, and societal factors. In addition to having theoretical significance, our results demonstrate the value of newly available data sources in addressing long-standing scientific questions.

Indexed as

automated text analysisPollyanna hypothesispositivity in languagesubjective happiness

Identifiers

PMID27872286
PMCPMC5150390

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.