Jo is at the gym one afternoon, jogging on the treadmill at 3.0 miles per hour. A stranger gets on the treadmill next to her and begins running at 6.5 miles per hour. Jo notices this, and slowly increases her own running speed. This enhancement of Jo’s performance on a simple task by the presence of others is called a. social facilitation. b. social augmentation. c. practical inhibition. d. peripheral bolstering.