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During the COVID-19 pandemic, suicide rates in Japan declined by 14% during the initial wave (February to June 2020) but increased by 16% in the second wave (July to October 2020), with a larger increase (37%) among females.
Herle et al. provide evidence that common genetic variants associated with BMI are also associated with eating behaviour trajectories in childhood, supporting the behavioural susceptibility theory of obesity.
Stein and Peelen show that discrimination performance can be used to dissociate conscious and unconscious contributions to detection effects in face perception and attention tasks.
Ma et al. examine why and how crowd synchronization forms spontaneously under different density conditions and what functional benefit synchronization offers for the collective motion of humans.
Wood et al. examine gender differences in Hadza hunter-gatherer spatial behaviour using 2,078 days of GPS-recorded travel. As predicted from principles of foraging ecology, Hadza men walked further per day, explored more land, followed more sinuous paths and were much more likely to be alone.
Alvarez-Rodriguez et al. examine group interactions by means of higher-order social networks. They propose a theoretical framework for studying real-world interactions and provide a case study of collaboration in science and technology.
Models indicate that reciprocity cannot evolve when errors lead to frequent misunderstanding between cooperators. Boyd and Mathew show that third-party arbitration allows reciprocity to thrive even when errors are common and arbitration is imperfect.
Deco et al. use multimodal neuroimaging data to quantify the global workspace as the common ‘functional rich club’ of regions intersecting across seven tasks as well as rest.
Zhang et al. build a cultural phylogeny of historical Islamic sects and schools from the seventh to twentieth centuries and use phylogenetic comparative methods to show that apocalyptic and reincarnation beliefs display distinct relationships with intergroup violence.
Integrating human mobility and activity data with ground-level measurements and air quality models, Shen et al. find that despite a reduction in outdoor PM2.5 during the COVID-19 quarantine in China, overall population exposure to PM2.5 increased.