Here’s a highly relevant, recently published paper:
Lasgaard M, Qualter P, Løvschall C, et al. Are loneliness interventions effective for reducing loneliness? A meta-analytic review of 280 studies. Am Psychol. Published online October 23, 2025. doi:10.1037/amp0001578
If you know German, you might be interested in the two books on loneliness published by Noëmi Seewer and Tobias Krieger.
Lasgaard M, Qualter P, Løvschall C, et al. Are loneliness interventions effective for reducing loneliness? A meta-analytic review of 280 studies. Am Psychol. Published online October 23, 2025. doi:10.1037/amp0001578
If you know German, you might be interested in the two books on loneliness published by Noëmi Seewer and Tobias Krieger.