Also https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0216643 https://journals.plos.org/plosone/article?id=10.1371/journal... : "Participants w

Also https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0216643 https://journals.plos.org/plosone/article?id=10.1371/journal... : "Participants with higher levels of repetitive negative thinking, those who only engaged in deconstructive types of meditation (e.g., vipassana/insight meditation), and those who had attended a meditation retreat at any point in their life were more likely to report unpleasant meditation-related experiences."