Another possibility is to wake your child up before the time that the terrors usually start, to disturb the sleep cycle and
hence prevent the night terrors.
Scheduled awakening hasn't been well tested
in preventing night terrors, however, and there's always the possibility that waking your child around the time of a night terror might trigger one.
That can help regulate their sleep schedule so the Sleep Guardian can go off at the perfect time to
prevent a night terror.
Some experts think this technique can change your child's sleep state enough to
prevent a night terror.