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  • An analysis of news shared on Twitter estimates the level of infodemic risk associated with COVID-19 across countries. Epidemic spread and infodemic risk co-evolve, with reliable information becoming more dominant as infection rates rise locally.

    • Riccardo Gallotti
    • Francesco Valle
    • Manlio De Domenico
    Article
  • Infants listened to lullabies and other songs recorded in cultures and languages that were unfamiliar to them. They relaxed more in response to the lullabies. This suggests that infants may be predisposed to respond to common features of lullabies.

    • Constance M. Bainbridge
    • Mila Bertolo
    • Samuel A. Mehr
    Article
  • Assaneo et al. show that speech production timing can facilitate perception. Individuals differed in whether they utilized motor timing depending on the auditory–motor cortex connection strength.

    • M. Florencia Assaneo
    • Johanna M. Rimmele
    • David Poeppel
    Article
  • People donate billions each year, yet giving is often ineffective. Five experiments tested an explanation for inefficient giving based on evolutionary game theory, ruling out alternative accounts based on cognitive or emotional limitations.

    • Bethany Burum
    • Martin A. Nowak
    • Moshe Hoffman
    Article
  • Controlled used of fire is one of the most outstanding achievements attributed to humankind. Artificial intelligence estimates the heating temperatures of flint tools fabricated by hominins over 300,000 years ago at Qesem Cave, providing insightful views into both advanced behaviours and the cognitive evolution of our species.

    • Aviad Agam
    • Ido Azuri
    • Filipe Natalio
    Article
  • In a study of Google News, Fischer et al. show that, unless users explicitly search for local terms, national outlets dominate, directing attention away from local news. This divide exacerbates existing news inequalities detrimental to civic health.

    • Sean Fischer
    • Kokil Jaidka
    • Yphtach Lelkes
    Article
  • Using a cultural evolutionary model, this paper proposes that organizations producing goods and services—both ancient craft guilds and modern firms—evolved because they facilitate the accumulation of culture. Ethnographic data support the predictions.

    • Francisco Brahm
    • Joaquin Poblete
    Article
  • In examining the impacts of the plain packaging tobacco law in Australia, Sun and colleagues uncover unintended negative consequences. In response to the policy, smokers switched from expensive to cheap cigarettes, and as smoking became less costly, they consumed more cigarettes.

    • David Underwood
    • Sizhong Sun
    • Riccardo A. M. H. M. Welters
    Article
  • Do human confidence judgments follow Bayesian principles? Using a task in which confidence is not reported on a scale but used to inform decisions, Lisi et al. find that behaviour is better explained by discrete confidence levels than Bayesian probability.

    • Matteo Lisi
    • Gianluigi Mongillo
    • Andrei Gorea
    Article
  • Cheyette and Piantadosi present a model of numerosity perception and find that core properties of number processing can be derived as optimal information processing with memory limits.

    • Samuel J. Cheyette
    • Steven T. Piantadosi
    Article
  • Schurgin et al. propose a model of visual memory, arguing against a distinction between how many items are represented and how precisely they are represented, and in favour of a view based on continuous representations in noisy channels.

    • Mark W. Schurgin
    • John T. Wixted
    • Timothy F. Brady
    Article
  • Götz et al. find that topography is related to personality across the United States (n = 3,387,014), with people in mountainous areas being less agreeable, extraverted, neurotic and conscientious but more open. East–west comparisons suggest frontier cultural heritage and ecological demands as possible mechanisms.

    • Friedrich M. Götz
    • Stefan Stieger
    • Peter J. Rentfrow
    Article