Research Digest News

> When retail sales staff smile everyone wins
> Teens learn music and sports best before bed
> Tipping more common in corrupt societies
> Happiness campaigns could make us sadder
> Pop music is getting progressively sadder
> If your plane gets lost look for an orienteer
> A target look bigger after a shot feels good
> Explaining the appeal of original works of art
> Psychopathy theories do influence judges
> Living abroad can be creative
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