Fig. 3
From: Measurement properties of the minimal insomnia symptom scale (MISS) in adolescents
ICCs representing the Minimal Insomnia Symptom Scale-Revised item 1 (‘difficulties falling asleep’; Panel A), item 2 (‘night awakenings’; Panel B), item 4 (‘daytime disturbance’; Panel C). ICCs represent expected item responses (y-axis) for each person location (x-axis) on the measured continuum. Black dots represent observed responses from groups of persons (class intervals) at similar locations on the measured continuum (x-axis)