Table 1.

Prescription for motion, one attribute from each column was selected for each motion trial.

Type of motion	Magnitude of motion	Timing of motion
“yes” nod (rotation about a right- left axis)	Large (move the nose from touching one side of the nose bridge to the other, or similar perceived motion)	Continuously (“slowly move without stopping”)
“no” shake (rotation about an inferior-superior axis)	Medium (move the nose from center to touching on one side nose bridge, or similar perceived motion)	Re-position with rests (“move to a new position and hold it for a couple of breaths, then repeat”)
random (combinations of nodding and rotation as well as translations)	Small (from center to the side without touching the nose bridge, or similar perceived motion)