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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Psychoneuroendocrinology. 2015 Jun 4;60:46–56. doi: 10.1016/j.psyneuen.2015.05.009

Figure 1.

Figure 1

Sample protocol for one study participant. Days 1–5 represent the stabilization phase, and days 6–25 represent the experimental phase during which time children participated in 4 randomly-ordered cortisol assessments: i) morning nap with experimenters collecting pre- and post-nap samples (MN-E); ii) afternoon nap with experimenters collecting pre- and post-nap samples (AN-E); iii) afternoon nap with parents collecting all samples (AN-P); and iv) no-nap with parents collecting all samples (NN-P). Solid black bars represent time in bed, and gray bars represent periods of wakefulness. Note. indicates salivary cortisol collection times.