1

Little or no movement (0% - 10% time)

Asleep

2

Occasional movement (10% - 25% time)

Dozing off but still responding

3

Intermittent movement (25% - 50% time)

Distracted, yawning or only somewhat alert

4

Frequent movement (50% - 75% time)

Completely awake and mostly alert

5

Constant movement (75% - 100% time)

Completely awake and fully alert