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Women's brains change in size across the menstrual cycle.
Do positive children become positive adults?
Reminders of death lead people to want to name their children after themselves.
10- to 13-month-old, but not 8-month-old, infants recognise that when big clashes with small, big usually wins.
Nature feature on the 1946 birth-cohort study (pdf).
The illusion of owning a third arm.
People make less impulsive decisions when they have a full bladder (pdf).
The role of working memory capacity in people's ability to perform mental tasks when in pain.
Tended forests had a larger beneficial effect on well-being than wild forests.
A brain imaging study of deliberate forgetting.
Meat-eaters see animals as less human than vegetarians do.
Cultural differences in the perceived intensity of emotion conveyed by people's facial expressions and body language. Co-author Gary McKeown told me: "... the paper advances studies of the universality of the perception of emotional expressions beyond showing static pictures of posed emotional expressions. Instead we showed people in different countries [Serbia, Peru, Guatemala and N. Ireland] video clips of people being somewhat emotional and got them to continuously rate the changes in positive and negative emotion. We found strong similarities in the pattern of perceived emotions, so the ups and downs of positive and negative valence were very similar, providing evidence for the universality of emotional expression. However, we found differences in the intensity to which these were interpreted. The clips featured mostly people from the UK, and the Northern Irish participants saw the most intense levels of emotion (more strictly emotional valence), the other countries varied in the perceived level of intensity although Serbia usually attributed the lowest levels of intensity."