Figure 7.

Intrinsic period estimation method. (A) The intrinsic $\tau$ of the model was iterated stepwise (from the initial $\tau$ of 24.2 h) for each participant until the time between DLMO_i and DLMO^p was <1 min. (B) Light intensity data of day 8 for participant BCM15, who showed a DLMO (△) earlier than predicted by the model with the default $\tau$ (◆). For this individual, a$\tau$ of 23.96 h resulted in a DLMO^p (▲) that was identical to the measured DLMO. Dashed lines show CBT_min^p using the default (gray) and individual (black) $\tau$. Solid lines show the value of state-variable x when the default (gray) or individual (black)$\tau$ was used.