Thrown together for an extended period of time, without sufficient room for autonomous behaviours, families come up against the phenomenon of ‘hypercopresence,’ which can happen with any interaction involving forced closeness – holiday gatherings included. Melanie Booth-Butterfield, a professor of communication studies at West Virginia University, US, who is writing a book on the topic, says that the negative effects can be long-lasting. “Hypercopresence can result in conflicts with relatives, angry words that cannot be taken back, and cold, rude nonverbal behaviours which leave lasting impressions,” she explains.