This is a long one because I haven’t found a lot on loneliness and I have been intrigued by behavioral inhibition since Kagan first talked about it. Verhagen, Derks, Roelofs & Maciejewski (2022) published “Behavioral Inhibition, Negative Parenting, and Social Withdrawal: Longitudinal associations with loneliness during early, middle, and late adolescence” in Child Development. Here’s an edited version of the article with some information in bold:

Several recent studies focus on adverse impacts of the pandemic on particular subpopulations. In the first, Mitchell, Banyard, Ybarra & Dunsiger (2022) published “Impact of the COVID-19 Pandemic for Youth with a History of Exposure to Self-directed Violence” in Psychological Trauma: Theory, Research, Practice, and Policy.