A simple demonstration of reaction time. Compare the reaction time of both of your hands: -To start, click on the arrow key corresponding to the hand (left arrow for left hand, right arrow for right hand) -When the blue oval turns orange, tap the spacebar as fast as you can -Repeat for a maximum of five times for each hand. The average reaction times for the left hand and right hand are displayed in the boxes labeled "Left Hand Avg." and "Right Hand Avg." respectively.