Fig. 1

Study overview. Actigraphy was measured throughout the full period, but ‘experimental’ days were excluded because all children were encouraged to either nap or stay awake in the afternoon regardless of their typical routine. Cognitive health measures were collected on nap- and wake-promotion days. Social-behavioral health measures were derived from caregiver/parent complete questionnaires that were distributed on Day 1 and collected at the end of the study period