Fig 2. Behavioral group data for young and old adults, showing the root-mean-square error (RMSE) angle between the avatar and the vertical during balance and dual-tasking (A), percentage trials with a correct answer on the calculation task during calculation and dual-tasking (B), and performance decline from single- to dual-tasking, averaged over the balance and calculation tasks (C).

Asterisks denote statistical significance (p<0.05).