Study finds that like yawning, sniffing is contagious.

Here’s another entry to add to our list of contagious behaviors (which currently includes yawning and driving like an old person): sniffing. In this study, the researchers had participants sit in an “odor clean room” and watch the movie Perfume, which contains “28 movie sniff events (MSEs) where a character takes a sniff” in the first 60 minutes of the film. While the movie was playing, the researchers measured how often the subjects sniffed within 7 seconds of hearing and/or seeing a sniff

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