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. Author manuscript; available in PMC: 2012 Aug 9.
Published in final edited form as: Chronobiol Int. 2010 Aug;27(7):1469–1492. doi: 10.3109/07420528.2010.503293

FIGURE 2.

FIGURE 2

Individual DLMO phases measured on Friday and Sunday evenings are plotted relative to scheduled bedtime on school nights (negative = earlier than bedtime; positive = later than bedtime) for Experiment 1. Lines connect Friday and Sunday values to illustrate individual phase shifts; however, we do not assume a linear time trajectory. Solid lines indicate a phase delay shift ≥30 min, and hashed lines indicate a phase delay shift <30 min. Circles illustrate those whose incomplete DLMO on a night excluded them from statistical analyses.