Maintenance: During the night from Tuesday to Wednesday, 28/29 May 2019, maintenance work on the ZORA NFS is scheduled for 7:00pm to 9:00am. During this period ZORA and JDB will not be available. Thank you for your patience.
Werner, H; Lebourgeois, M K; Geiger, A; Jenni, O G (2009). Assessment of chronotype in four- to eleven-year-old children: reliability and validity of the Children's Chronotype Questionnaire (CCTQ). Chronobiology International, 26(5):992-1014.