TIL that a study shows wearing a mask decreased the quality of chess players’ decisions—a measure of their cognitive performance. However, the disruptive effect of masks is relatively short-lived, gradually weakening so that there is no measurable disadvantage after roughly 4 hours of play.

https://www.pnas.org/doi/full/10.1073/pnas.2206528119
#til #todayilearned
https://www.reddit.com/r/todayilearned/comments/1gpu3s3/til_that_a_study_shows_wearing_a_mask_decreased/