13. Starting Position:	While sitting, put your hand in your lap. Pretend you see a drinking glass on a table directly in front of you.
Action:	Reach forward, grasp the glass and lift it slightly off the table. Now place it back on the table and return your hand to your lap.
Mental Task:	Assume the starting position. Attempt to see yourself making the movement just performed with as clear and vivid a visual image as possible. Now rate the ease/difficulty with which you were able to do this mental task.